- 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 culture capable of a self-induced death-simulation technique that is teachable to and usable by others, including Hupyrians and Ferengi — as servant Maihar'du taught Grand Nagus Zek.