Evolution

You may be looking for the TNG episode Evolution.

Evolution is the change in a population from which a new species is developed.

See also

• Hyper-evolution

References

• TAS: "The Ambergris Element"
• TNG: "Shades of Gray"
• DS9:
  • "In the Hands of the Prophets"
  • "Playing God"
  • "Chimera"
• ENT: "Dear Doctor"