- 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
Planet: Tagus III. By law, these spacefaring natives had sealed off the famous ruins of their world to outsiders' research by 2267. The adjective form, as with "Betazoid"/"Betazed," is "Taguan."