- 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
Class-M planet that is geologically younger than expected, given the age of its star. The planet is inhabited by aboriginal reptilian natives, watched over by a highly advanced noncorporeal intelligence.