- 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 highly-advanced society that reached its peak just before dying out about 200,000 years ago, based from a homeworld now near the Romulan side of the Neutral Zone. Dubbed by history as conquerors, their use of a highly advanced galactic-wide transporter allowed their empire to flourish; at least one outpost was in the Gamma Quadrant.