List of various holograms appearing as Klingons.
These Klingons were created for a Hirogen simulation run aboard USS Voyager in 2374 that the Hirogens used to hunt the Voyager crew as prey. Neelix persuaded them to attack the Nazi characters in the World War II program. (VOY: "The Killing Game", "The Killing Game, Part II")
This holographic Klingon warrior was part of B'Elanna Torres' Day of Honor holoprogram in 2374.
After Torres was tired to hear about the Klingon rituals from Moklor, she decided to leave the program but was stopped by this Klingon warrior whom she defeated in a fight. (VOY: "Day of Honor")
This holographic Klingon was portrayed by veteran stuntman Tom Morga, who received no credit for this appearance.