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{{at|xx}}__NOTOC__
  
{{at|xx}}__NOTOC__
 
[[File:Krenim Weapon Ship Firing on Zahl Colony.jpg|thumb|A [[Zahl]] [[colony]] fired upon by the [[Krenim weapon ship]]...]]
  
[[File:Krenim Weapon Ship Firing on Zahl Colony.jpg|thumb|A [[Zahl]] [[colony]] fired upon by the [[Krenim weapon ship]]...]]
−
[[File:Zahl Colony Erased from History.jpg|thumb|...and the alternate timeline where the colony never existed]]
 +
[[File:Zahl Colony Erased from History.jpg|thumb|...and the alternate timeline where the colony never existed.]]
−
{{Disambiguate|the alternate timeline created by [[Nero]]'s incursion|alternate reality}}
 +
{{disambiguation|the alternate timeline created by [[Nero]]'s incursion|alternate reality}}
   
 
'''Alternate timelines''' were altered versions of a single [[universe]]. There were several methods of temporal manipulation that could create an altered version of a timeline.
 
'''Alternate timelines''' were altered versions of a single [[universe]]. There were several methods of temporal manipulation that could create an altered version of a timeline.
   
−
* A [[temporal incursion]] into the past could cause an alternate chain of events to unfold. However, in the cases where the time travel event was part of a [[predestination paradox]], an alternate timeline was not created. ({{DS9|Trials and Tribble-ations}}) In at least one case, when accidental time travel from [[2371]] led to the premature death of [[Gabriel Bell]] in [[2024]], an altered future existed for the same amount of time it took for [[Benjamin Sisko]] to replace and complete Bell's vital role in the "[[Bell Riots]]" of 2024. ({{DS9|Past Tense, Part I|Past Tense, Part II}})
 +
* A [[temporal incursion]] into the past could cause an alternate chain of events to unfold. However, in the cases where the time travel event was part of a [[predestination paradox]], an alternate timeline was not created. ({{DS9|Trials and Tribble-ations}}) In at least one case, when accidental time travel from [[2371]] led to the premature death of [[Gabriel Bell]] in [[2024]], an altered future existed for the same amount of time it took for [[Benjamin Sisko]] to replace and complete Bell's vital role in the "[[Bell Riots]]" of 2024. ({{DS9|Past Tense, Part I|Past Tense, Part II}})
   
 
* [[Time travel]] to the future of a timeline could create an alternate future, where the time traveler had never returned back to the past from the future. Such was the case, for example, when the {{USS|Enterprise|NCC-1701-C|-C}} traveled from [[2344]] to [[2366]] through a [[temporal rift]]. ({{TNG|Yesterday's Enterprise}}; {{DS9|The Visitor}}; {{ENT|Shockwave|Shockwave, Part II}}) This however did not always occur, such as in the case when [[Samuel Clemens]] visited the [[24th century]] through a [[temporal distortion]] created by the [[Devidian]]s. ({{TNG|Time's Arrow, Part II}})
  
* [[Time travel]] to the future of a timeline could create an alternate future, where the time traveler had never returned back to the past from the future. Such was the case, for example, when the {{USS|Enterprise|NCC-1701-C|-C}} traveled from [[2344]] to [[2366]] through a [[temporal rift]]. ({{TNG|Yesterday's Enterprise}}; {{DS9|The Visitor}}; {{ENT|Shockwave|Shockwave, Part II}}) This however did not always occur, such as in the case when [[Samuel Clemens]] visited the [[24th century]] through a [[temporal distortion]] created by the [[Devidian]]s. ({{TNG|Time's Arrow, Part II}})
   
−
* When objects were pushed out of the [[space-time continuum]], they were also erased from history, creating an altered timeline, where the object never came into being. Such was the case with the effect of the main weapon of the [[Krenim weapon ship]] and destroying the [[interspatial parasite]]s that had infected [[Captain]] [[Jonathan Archer]] in the [[22nd century]]. ({{VOY|Year of Hell}}; {{ENT|Twilight}})
 +
* Sometimes objects and people who had traveled through time from the future into the past would vanish when the timeline is altered enough, such as an alternate [[Captain]] [[Jean-Luc Picard]] who came to the past through an [[energy vortex]] in [[2365]]. ({{TNG|Time Squared}}) When objects were pushed completely out of the [[space-time continuum]], they were also erased from history, creating an altered timeline, where the object never came into being. Such was the case with the effect of the main [[energy beam]] weapon of the [[Krenim weapon ship]] and destroying the [[interspatial parasite]]s that had infected [[Captain]] [[Jonathan Archer]] in the [[22nd century]]. ({{VOY|Year of Hell}}; {{ENT|Twilight}}) According to the [[Borg Queen]], a similar fate would have awaited the alternate future [[Vice Admiral]] [[Kathryn Janeway]], if the Queen had managed to kill her counterpart Captain Janeway in [[2378]]. ({{VOY|Endgame}}) More commonly though, changes to the past of a timeline did not cause the objects and people from an alternate future to vanish. Multiple versions would then coexist. These alternate versions could be reintegrated into a single person using [[29th century]] technology. ({{VOY|Relativity}})
   
−
[[Starfleet]] officers were forbidden to cause changes in the timeline or to share their knowledge of future events by the [[Temporal Prime Directive]]. ({{VOY|Shattered}}) By the [[28th century]], changing the timeline had become more universally illegal after the [[Temporal Accord]] was established. ({{ENT|Cold Front}}) By the [[29th century]], Starfleet had taken it on as a mission to use time travel as a means of upholding the integrity of the timeline by fixing changes in the past. It was also Starfleet policy by then to integrate different versions of people into one, when several coexisting ones appeared due to paradoxes and time travel. ({{VOY|Relativity}})
 +
As a rule, [[Starfleet]] officers were forbidden to cause changes in the timeline or to share their knowledge of future events by the [[Temporal Prime Directive]]. ({{VOY|Shattered}}) The [[Department of Temporal Investigations]] was tasked to ensure that time travel events did not contaminate the timeline. ({{DS9|Trials and Tribble-ations}}) By the [[28th century]], changing the timeline had become more universally illegal after the [[Temporal Accord]] was established. ({{ENT|Cold Front}}) By the 29th century, Starfleet had taken it on as a mission to use time travel as a means of upholding the integrity of the timeline by fixing changes in the past. It was also Starfleet policy by then to integrate different versions of people into one, when several coexisting ones appeared due to paradoxes and time travel. ({{VOY|Relativity}})
   
−
While the prime timeline was usually restored by operatives from the 29th to the [[31st century|31st centuries]], in some cases, the influence of alternate timelines remained as a part of the chain of events in the prime timeline. [[Spock]] for instance would not have learned that he had to travel to the past to save himself from being killed by a [[Le-matya]] when he was seven years old, had he not accidentally traveled to an alternate timeline, where he had not yet saved himself. ({{TAS|Yesteryear}}) Warnings, temporal incursions and information of alternate futures were also an integral part of the prime timeline. Such was the case, when [[Captain]] [[Jean-Luc Picard]] shared his experiences of the [[Anti-time future|future]] shown to him by [[Q]], to his crew in [[2370]], allowing them to make different life choices. ({{TNG|All Good Things...}}) {{USS|Voyager}} was rescued and aided by it's crew members from the future. In [[2375]], a transmission from [[Harry Kim]] from an alternate [[2390]] averted the crash landing of the ''Voyager''. In [[2378]], technology and assistance from [[Admiral]] [[Kathryn Janeway]] from an alternate [[2404]] saved the ship from a long and disastrous journey through the [[Delta Quadrant|Delta]] and [[Beta Quadrant]]s. ({{VOY|Timeless|Endgame}})
 +
While the prime timeline was usually restored by operatives from the 29th to the [[31st century|31st centuries]], in some cases, the influence of alternate timelines remained as a part of the chain of events in the prime timeline. [[Spock]] for instance would not have learned that he had to travel to the past to save himself from being killed by a [[Le-matya]] when he was seven years old, had he not accidentally traveled to an alternate timeline, where he had not yet saved himself. ({{TAS|Yesteryear}}) Warnings, temporal incursions and information of alternate futures were also an integral part of the prime timeline. Such was the case, when Captain Jean-Luc Picard shared his experiences of the [[Anti-time future|future]] shown to him by [[Q]], to his crew in [[2370]], allowing them to make different life choices. ({{TNG|All Good Things...}}) {{USS|Voyager}} was rescued and aided by its crew members from the future. In [[2375]], a transmission from [[Harry Kim]] from an alternate [[2390]] averted the crash landing of the ''Voyager''. In [[2378]], technology and assistance from [[Admiral]] [[Kathryn Janeway]] from an alternate [[2404]] saved the ship from a longer disastrous journey through the [[Delta Quadrant|Delta]] and [[Beta Quadrant]]s. ({{VOY|Timeless|Endgame}})
   
 
{{bginfo|For a list of all the various time travel and alternate timeline episodes in Star Trek, see: [[time travel episodes]] and [[alternate timeline episodes]].}}
  
{{bginfo|For a list of all the various time travel and alternate timeline episodes in Star Trek, see: [[time travel episodes]] and [[alternate timeline episodes]].}}
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[[File:Narada.jpg|thumb|The ''[[Narada]]'' appearing out of a [[black hole]], creating an [[alternate reality]]]]
  
[[File:Narada.jpg|thumb|The ''[[Narada]]'' appearing out of a [[black hole]], creating an [[alternate reality]]]]
−
* Time travel to the past through the [[red matter]] created [[black hole]] by the [[Romulan]] [[mining vessel]] ''[[Narada]]'' resulted in the creation of an [[alternate reality]]. ({{film|11}})
+
* Time travel to the past by the [[Romulan]] [[mining vessel]] ''[[Narada]]'' through a [[black hole]] created with [[red matter]] resulted in the creation of an [[alternate reality]]. ({{film|11}})
   
−
{{bginfo|The writers of {{film|11}}, [[Alex Kurtzman]] and [[Roberto Orci]], were asked about the implications of the new alternate reality that was introduced in the film in an interview. They explained the new reality runs parallel to the prime reality as a new [[quantum reality]], as the concept was explained by Data in the episode "Parallels".[http://trekmovie.com/2008/12/11/bob-orci-explains-how-the-new-star-trek-movie-fits-with-trek-canon-and-real-science/]}}
 +
{{bginfo|The writers of {{film|11}}, [[Alex Kurtzman]] and [[Roberto Orci]], were asked about the implications of the new alternate reality that was introduced in the film in an interview. They explained the new reality runs parallel to the prime reality as a new [[quantum reality]], as the concept was explained by Data in the episode {{TNG|Parallels}}. ''[http://trekmovie.com/2008/12/11/bob-orci-explains-how-the-new-star-trek-movie-fits-with-trek-canon-and-real-science/]}}
   
 
* In [[2370]], [[Q]] allowed Picard to shift his consciousness between three parallel timelines, one in the [[Anti-time past|past]], one in the [[Anti-time present|present]] and one in the [[Anti-time future|future]] from Picard's point of view, in order for him to create an [[anti-time eruption]]. The eruption was linking these universes together. When it was sealed into subspace, the coexisting timelines also collapsed. ({{TNG|All Good Things...}})
  
* In [[2370]], [[Q]] allowed Picard to shift his consciousness between three parallel timelines, one in the [[Anti-time past|past]], one in the [[Anti-time present|present]] and one in the [[Anti-time future|future]] from Picard's point of view, in order for him to create an [[anti-time eruption]]. The eruption was linking these universes together. When it was sealed into subspace, the coexisting timelines also collapsed. ({{TNG|All Good Things...}})
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* A brief experience with a [[parallel reality]] was theorized to be one possibile cause for [[Tuvok]]'s breakdown in [[2373]] over memories of events Tuvok had not experienced. The cause was later on discovered to be a [[memory virus]] unknowingly transmitted to him from [[Lieutenant Commander]] [[Dmitri Valtane]], in [[2293]]. ({{VOY|Flashback}})
  
* A brief experience with a [[parallel reality]] was theorized to be one possibile cause for [[Tuvok]]'s breakdown in [[2373]] over memories of events Tuvok had not experienced. The cause was later on discovered to be a [[memory virus]] unknowingly transmitted to him from [[Lieutenant Commander]] [[Dmitri Valtane]], in [[2293]]. ({{VOY|Flashback}})
   
−
{{bginfo|Several statements in Star Trek suggest that all alternate timelines co-exist. It was stated in {{ENT|Azati Prime}} that the Sphere Builders have technology that allows them to examine alternate timelines. In the episode, [[Daniels (Crewman)|Daniels]] even had the technology to take [[Jonathan Archer|Archer]] to an alternate future. The [[time vortex]] was called a focal point of "all timelines" in {{TAS|Yesteryear}}. The term "alternate reality" was used by the [[mirror universe]] [[T'Pol (mirror)|T'Pol]] in {{ENT|In a Mirror, Darkly}} as a synonym for "parallel universe".}}
 +
{{bginfo|Several statements in Star Trek suggest that all alternate timelines co-exist. It was stated in {{ENT|Azati Prime}} that the Sphere Builders have technology that allows them to examine alternate timelines. In the episode, {{dis|Daniels|Crewman}} even had the technology to take [[Jonathan Archer|Archer]] to the future of an alternate timeline. The [[time vortex]] was called a focal point of "all timelines" in {{TAS|Yesteryear}}.|The term "alternate reality" was used as a synonym for "parallel universe" by the [[mirror universe]] version of [[T'Pol (mirror)|T'Pol]] in {{ENT|In a Mirror, Darkly}} }}
   
 
==Pockets, folds and fragments==
  
==Pockets, folds and fragments==
 
[[File:USS Enterprise-E enters temporal vortex.jpg|thumb|An alternate [[Earth]], assimilated by the [[Borg]] after their [[temporal incursion]], seen from the [[Temporal wake|wake]] of a [[temporal vortex]]]]
  
[[File:USS Enterprise-E enters temporal vortex.jpg|thumb|An alternate [[Earth]], assimilated by the [[Borg]] after their [[temporal incursion]], seen from the [[Temporal wake|wake]] of a [[temporal vortex]]]]
−
* It was possible to artificially create pockets, where a previous timeline continued, while the timeline of the rest of the universe was changed. Such technology as a [[subspace bubble]], a [[subspace isolation field]], [[temporal shield]]ing and the [[Temporal wake|wake]] of a [[temporal vortex]] kept any enveloped object in a pocket with its own timeline. The [[Guardian of Forever]] was also capable of maintaining the [[time vortex planet]] in its original timeline. ({{TNG|Timescape}}, {{DS9|Past Tense, Part I}}; {{VOY|Year of Hell}}; {{film|8}}; {{TOS|The City on the Edge of Forever}})
 +
* It was possible to artificially create pockets, where a previous timeline continued, while the timeline of the rest of the universe was changed. Such technology as a [[subspace bubble]], a [[subspace isolation field]], [[temporal shield]]ing and the [[Temporal wake|wake]] of a [[temporal vortex]] kept any enveloped object in a pocket with its own timeline. The [[Guardian of Forever]] was also capable of maintaining the [[Unnamed Alpha and Beta Quadrant planets#Time planet|time planet]] in its original timeline. ({{TNG|Timescape}}, {{DS9|Past Tense, Part I}}; {{VOY|Year of Hell}}; {{film|8}}; {{TOS|The City on the Edge of Forever}})
   
 
* The race of the alien, who took the shape of [[Cosimo]], existed in [[temporal inversion fold]]s of the [[space-time matrix]]. The folds were parallel [[time stream]]s visible as temporal anomalies intersecting the prime reality. Inside the folds, reality remained unaffected by changes in the timeline. It was possible to utilize a fold to exchange one's consciousness with an alternate possible timeline version of oneself. ({{VOY|Non Sequitur}})
  
* The race of the alien, who took the shape of [[Cosimo]], existed in [[temporal inversion fold]]s of the [[space-time matrix]]. The folds were parallel [[time stream]]s visible as temporal anomalies intersecting the prime reality. Inside the folds, reality remained unaffected by changes in the timeline. It was possible to utilize a fold to exchange one's consciousness with an alternate possible timeline version of oneself. ({{VOY|Non Sequitur}})
Line 51: Line 51:
 
* The [[quantum singularity lifeform]]s were native to a parallel time continuum. They utilized [[temporal aperture]]s to travel between continuums and delivered their embryos to mature in nests inside the [[gravity well]]s of [[Quantum singularity|quantum singularities]] in our universe. The adult beings of the species were capable of taking humanoid form and were unaffected by [[temporal fracture]]s. ({{TNG|Timescape}})
  
* The [[quantum singularity lifeform]]s were native to a parallel time continuum. They utilized [[temporal aperture]]s to travel between continuums and delivered their embryos to mature in nests inside the [[gravity well]]s of [[Quantum singularity|quantum singularities]] in our universe. The adult beings of the species were capable of taking humanoid form and were unaffected by [[temporal fracture]]s. ({{TNG|Timescape}})
   
−
* [[Elysia]] was a small parallel time continuum that periodically touched the prime universe in the [[Delta Triangle]] region. Elysia was described by [[Devna]], as a pocket in the garment of time. The collisions between the two alternate universes produced [[time warp]] vortexes in the [[time barrier]] between the universes, that allowed passage from one side to the other at high warp speed. ({{TAS|The Time Trap}})
 +
* [[Elysia]] was a small parallel time continuum that periodically touched the prime universe in the [[Delta Triangle]] region. Elysia was described by [[Devna]] as a pocket in the garment of time. The collisions between the two alternate universes produced [[time warp]] vortexes in the [[time barrier]] between the universes, that allowed passage from one side to the other at high warp speed. ({{TAS|The Time Trap}})
   
 
== Appendices ==
  
== Appendices ==
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<div class="appear">
  
<div class="appear">
 
*{{TOS}}
  
*{{TOS}}
−
**{{e|Tomorrow is Yesterday}}
 +
**{{e|Tomorrow is Yesterday}} (Season 1)
 
**{{e|The City on the Edge of Forever}}
  
**{{e|The City on the Edge of Forever}}
−
**{{e|All Our Yesterdays}}
 +
**{{e|All Our Yesterdays}} (Season 3)
 
*{{TAS}}
  
*{{TAS}}
−
**{{e|Yesteryear}}
 +
**{{e|Yesteryear}} (Season 1)
 
*{{TNG}}
  
*{{TNG}}
−
**{{e|Time Squared}}
 +
**{{e|Time Squared}} (Season 2)
−
**{{e|Yesterday's Enterprise}}
 +
**{{e|Yesterday's Enterprise}} (Season 3)
−
**{{e|Tapestry}}
 +
**{{e|Tapestry}} (Season 6)
−
**{{e|Parallels}}
 +
**{{e|Parallels}} (Season 7)
 
**{{e|All Good Things...}}
  
**{{e|All Good Things...}}
 
*{{DS9}}
  
*{{DS9}}
−
**{{e|Past Tense, Part I}}
 +
**{{e|Past Tense, Part I}} (Season 3)
 
**{{e|Past Tense, Part II}}
  
**{{e|Past Tense, Part II}}
 
**{{e|Visionary}}
  
**{{e|Visionary}}
−
**{{e|The Visitor}}
 +
**{{e|The Visitor}} (Season 4)
−
**{{e|Trials and Tribble-ations}}
 +
**{{e|Trials and Tribble-ations}} (Season 5)
 
**{{e|Children of Time}}
  
**{{e|Children of Time}}
−
**{{e|Time's Orphan}}
 +
**{{e|Time's Orphan}} (Season 6)
 
*{{VOY}}
  
*{{VOY}}
−
**{{e|Time and Again}}
 +
**{{e|Time and Again}} (Season 1)
−
**{{e|Non Sequitur}}
 +
**{{e|Non Sequitur}} (Season 2)
−
**{{e|Future's End}}
 +
**{{e|Future's End}} (Season 3)
 
**{{e|Future's End, Part II}}
  
**{{e|Future's End, Part II}}
 
**{{e|Before and After}}
  
**{{e|Before and After}}
−
**{{e|Year of Hell}}
 +
**{{e|Year of Hell}} (Season 4)
 
**{{e|Year of Hell, Part II}}
  
**{{e|Year of Hell, Part II}}
−
**{{e|Timeless}}
 +
**{{e|Timeless}} (Season 5)
 
**{{e|Relativity}}
  
**{{e|Relativity}}
−
**{{e|Fury}}
 +
**{{e|Fury}} (Season 6)
−
**{{e|Shattered}}
 +
**{{e|Shattered}} (Season 7)
 
**{{e|Endgame}}
  
**{{e|Endgame}}
 
*{{ENT}}
  
*{{ENT}}
−
**{{e|Shockwave}}
 +
**{{e|Shockwave}} (Season 1)
−
**{{e|Shockwave, Part II}}
 +
**{{e|Shockwave, Part II}} (Season 2)
−
**{{e|Twilight}}
 +
**{{e|Twilight}} (Season 3)
 
**{{e|E²}}
  
**{{e|E²}}
−
**{{e|Storm Front}}
 +
**{{e|Storm Front}} (Season 4)
 
**{{e|Storm Front, Part II}}
  
**{{e|Storm Front, Part II}}
−
*[[Star Trek films|''Star Trek'' films]]
 +
*{{Star Trek films}}
 
**{{film|7}}
  
**{{film|7}}
 
**{{film|8}}
  
**{{film|8}}
 
**{{film|11}}
  
**{{film|11}}
  +
**{{film|12}}
 
</div>
  
</div>
   
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=== Apocrypha ===
  
=== Apocrypha ===
−
* According to the ''[[Star Trek: Myriad Universes]]'' story [[Infinity's Prism#Places of Exile|Places of Exile]] by [[Christopher L. Bennett]] in the {{y|2008}} novel of the series, ''[[Infinity's Prism]]'', the concept of [[Quantum reality|quantum realities]] is synonymous with all types of alternate timelines. According to the novel 2008 novel ''[[Fearful Symmetry]]'' by [[Olivia Woods]], the [[mirror universe]] is also a parallel quantum universe, further suggesting that even [[Parallel universe#Trans-dimensional realms|trans-dimensional realms]] are alternate timelines.
+
According to the ''[[Star Trek: Myriad Universes]]'' story "[[Infinity's Prism#Places of Exile|Places of Exile]]" by [[Christopher L. Bennett]] in the {{y|2008}} novel of the series, ''[[Infinity's Prism]]'', the concept of [[Quantum reality|quantum realities]] is synonymous with all types of alternate timelines. According to the novel 2008 novel ''[[Fearful Symmetry]]'' by [[Olivia Woods]], the [[mirror universe]] is also a parallel quantum universe, further suggesting that even [[Parallel universe#Trans-dimensional realms|trans-dimensional realms]] are alternate timelines.
   
  +
The ''[[Star Trek: Department of Temporal Investigations]]'' novel ''[[Watching the Clock]]'', goes into detail about how and why some forms of time travel create parallel alternate realities and others lead to the overwriting of the same timeline. According to the novel, the only way one timeline could replace another is if they coexisted side by side from the moment of their divergence and were merged together again at a later point. Timelines diverge when they shift sufficiently out of phase to become non-interacting, but it is not impossible for them to interfere again at a later point in time. If they did become entangled as a single system, quantum information theory demands that only one of the two conflicting sets of information survive, as quantum history has to be self-consistent. After the merge, it would be as if one timeline suddenly transformed into another. The previous events would still have occurred, but they would no longer be remembered, as the information would have been destroyed. Two different timelines coming back into phase would violate entropy, so there needs to be some kind of force acting to merge them back together.
⚫
* The game ''[[Star Trek: Armada]]'' features the USS ''Premonition'', ({{mbeta|USS Premonition}}) a starship came from an alternate future where the Borg controlled most of the [[Alpha Quadrant]]. Captain Thaddius Deming of the ''Premonition'' hoped to warn the Federation of a coming Borg invasion in time to prevent the Borg victory. With the help of [[Captain]] [[Jean-Luc Picard]] of the {{USS|Enterprise|NCC-1701-E|-E}}, and after making two further temporal incursions, the ''Premonition''{{'}}s mission was a success and she returned back to the future.
  
  +
  ⚫
The game ''[[Star Trek: Armada]]'' features the {{mbeta|USS Premonition|USS ''Premonition''}} a starship came from an alternate future where the Borg controlled most of the [[Alpha Quadrant]]. Captain Thaddius Deming of the ''Premonition'' hoped to warn the Federation of a coming Borg invasion in time to prevent the Borg victory. With the help of [[Captain]] [[Jean-Luc Picard]] of the {{USS|Enterprise|NCC-1701-E|-E}}, and after making two further temporal incursions, the ''Premonition''{{'}}s mission was a success and she returned back to the future.
   
 
=== External link ===
  
=== External link ===
 
* [http://groups.yahoo.com/group/alternity/ Alternity] - a [http://www.yahoo.com Yahoo!] group for the discussion of ''Star Trek'' alternate history
  
* [http://groups.yahoo.com/group/alternity/ Alternity] - a [http://www.yahoo.com Yahoo!] group for the discussion of ''Star Trek'' alternate history
   
  +
  ⚫
[[Category:Timeline| Alternate timeline]]
   
 
[[de:Alternative Zeitlinie]]
  
[[de:Alternative Zeitlinie]]
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[[ja:別の時間軸]]
  
[[ja:別の時間軸]]
 
[[nl:Alternatieve tijdlijn]]
  
[[nl:Alternatieve tijdlijn]]
  +
[[pt:Linha do tempo alternativa]]
⚫
[[Category:Timeline| Alternate timeline]]
  

Revision as of 04:53, 16 March 2015

AT: "xx"

File:Krenim Weapon Ship Firing on Zahl Colony.jpg

A Zahl colony fired upon by the Krenim weapon ship...

File:Zahl Colony Erased from History.jpg

...and the alternate timeline where the colony never existed.

For the alternate timeline created by Nero's incursion, please see alternate reality.

Alternate timelines were altered versions of a single universe. There were several methods of temporal manipulation that could create an altered version of a timeline.

As a rule, Starfleet officers were forbidden to cause changes in the timeline or to share their knowledge of future events by the Temporal Prime Directive. (VOY: "Shattered") The Department of Temporal Investigations was tasked to ensure that time travel events did not contaminate the timeline. (DS9: "Trials and Tribble-ations") By the 28th century, changing the timeline had become more universally illegal after the Temporal Accord was established. (ENT: "Cold Front") By the 29th century, Starfleet had taken it on as a mission to use time travel as a means of upholding the integrity of the timeline by fixing changes in the past. It was also Starfleet policy by then to integrate different versions of people into one, when several coexisting ones appeared due to paradoxes and time travel. (VOY: "Relativity")

While the prime timeline was usually restored by operatives from the 29th to the 31st centuries, in some cases, the influence of alternate timelines remained as a part of the chain of events in the prime timeline. Spock for instance would not have learned that he had to travel to the past to save himself from being killed by a Le-matya when he was seven years old, had he not accidentally traveled to an alternate timeline, where he had not yet saved himself. (TAS: "Yesteryear") Warnings, temporal incursions and information of alternate futures were also an integral part of the prime timeline. Such was the case, when Captain Jean-Luc Picard shared his experiences of the future shown to him by Q, to his crew in 2370, allowing them to make different life choices. (TNG: "All Good Things...") USS Voyager was rescued and aided by its crew members from the future. In 2375, a transmission from Harry Kim from an alternate 2390 averted the crash landing of the Voyager. In 2378, technology and assistance from Admiral Kathryn Janeway from an alternate 2404 saved the ship from a longer disastrous journey through the Delta and Beta Quadrants. (VOY: "Timeless", "Endgame")

For a list of all the various time travel and alternate timeline episodes in Star Trek, see: time travel episodes and alternate timeline episodes.

Alternate realities

Different versions of a timeline also sometimes coexist as parallel universes. Most active temporal anomalies allow interaction between two different alternate timelines for a moment, making them parallel realities in relation to one another.

Narada

The Narada appearing out of a black hole, creating an alternate reality

The writers of Star Trek, Alex Kurtzman and Roberto Orci, were asked about the implications of the new alternate reality that was introduced in the film in an interview. They explained the new reality runs parallel to the prime reality as a new quantum reality, as the concept was explained by Data in the episode TNG: "Parallels". [1]
  • In 2370, Q allowed Picard to shift his consciousness between three parallel timelines, one in the past, one in the present and one in the future from Picard's point of view, in order for him to create an anti-time eruption. The eruption was linking these universes together. When it was sealed into subspace, the coexisting timelines also collapsed. (TNG: "All Good Things...")
Several statements in Star Trek suggest that all alternate timelines co-exist. It was stated in ENT: "Azati Prime" that the Sphere Builders have technology that allows them to examine alternate timelines. In the episode, Daniels even had the technology to take Archer to the future of an alternate timeline. The time vortex was called a focal point of "all timelines" in TAS: "Yesteryear".
The term "alternate reality" was used as a synonym for "parallel universe" by the mirror universe version of T'Pol in ENT: "In a Mirror, Darkly"

Pockets, folds and fragments

USS Enterprise-E enters temporal vortex

An alternate Earth, assimilated by the Borg after their temporal incursion, seen from the wake of a temporal vortex

  • The race of the alien, who took the shape of Cosimo, existed in temporal inversion folds of the space-time matrix. The folds were parallel time streams visible as temporal anomalies intersecting the prime reality. Inside the folds, reality remained unaffected by changes in the timeline. It was possible to utilize a fold to exchange one's consciousness with an alternate possible timeline version of oneself. (VOY: "Non Sequitur")
  • Temporal causality loops create independent fragments of time, inside which the time of the universe repeats itself. From outside the loop, it appears as if the things inside had simply vanished from the space-time continuum. For people inside to loop the memories from previous loops begin to assert themselves as a sense of déjá vu, and eventually clearer memories. (TNG: "Cause and Effect")

Time continuums

Devidians

The Devidian time continuum

Within the universe there were also several parallel time continuums occupying the same space but in a different time. (TNG: "Time's Arrow")

  • Elysia was a small parallel time continuum that periodically touched the prime universe in the Delta Triangle region. Elysia was described by Devna as a pocket in the garment of time. The collisions between the two alternate universes produced time warp vortexes in the time barrier between the universes, that allowed passage from one side to the other at high warp speed. (TAS: "The Time Trap")

Appendices

Appearances

Alternate timelines are depicted in the following episodes or films:

Related topics

Apocrypha

According to the Star Trek: Myriad Universes story "Places of Exile" by Christopher L. Bennett in the 2008 novel of the series, Infinity's Prism, the concept of quantum realities is synonymous with all types of alternate timelines. According to the novel 2008 novel Fearful Symmetry by Olivia Woods, the mirror universe is also a parallel quantum universe, further suggesting that even trans-dimensional realms are alternate timelines.

The Star Trek: Department of Temporal Investigations novel Watching the Clock, goes into detail about how and why some forms of time travel create parallel alternate realities and others lead to the overwriting of the same timeline. According to the novel, the only way one timeline could replace another is if they coexisted side by side from the moment of their divergence and were merged together again at a later point. Timelines diverge when they shift sufficiently out of phase to become non-interacting, but it is not impossible for them to interfere again at a later point in time. If they did become entangled as a single system, quantum information theory demands that only one of the two conflicting sets of information survive, as quantum history has to be self-consistent. After the merge, it would be as if one timeline suddenly transformed into another. The previous events would still have occurred, but they would no longer be remembered, as the information would have been destroyed. Two different timelines coming back into phase would violate entropy, so there needs to be some kind of force acting to merge them back together.

The game Star Trek: Armada features the USS Premonition at Memory Beta, the wiki for licensed Star Trek works a starship came from an alternate future where the Borg controlled most of the Alpha Quadrant. Captain Thaddius Deming of the Premonition hoped to warn the Federation of a coming Borg invasion in time to prevent the Borg victory. With the help of Captain Jean-Luc Picard of the USS Enterprise-E, and after making two further temporal incursions, the Premonition's mission was a success and she returned back to the future.

External link

  • Alternity - a Yahoo! group for the discussion of Star Trek alternate history
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