- 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
Man-made spatial phenomena. What appeared to be a comet with an erratic trajectory and an apparent gravitational parent body was discovered to be a "prison" for a wayward Q to prevent his own suicide.