- 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 Sheliak vessel encountered the Enterprise-D and demanded that the Federation evacuate all human "vermin" from the planet Tau Cygna V, a planet that belongs to the alien race, as stated in a Federation treaty.
Picard negotiated with the captain of the vessel, using a clause in the treaty to buy more time to evacuate Tau Cygna V.