- 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
The home planet (pronounced "al-TOUR-uh") of a space-faring culture known to include merchants, some of whom operate in Deep Space Nine's vicinity.