- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
A cloned race of scientists descended entirely from the five survivors-the "Progenitors"-of a colony ship in the 22nd Century; they abandoned sexual reproduction due to their limited gene pool and found it repugnant being being reunited with the lusty Bringloidi, their original shipmates, in 2365 to avoid the 15-generation limit of replicative fading.