- 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
This early Federation starship is notable for its fateful stop on the planet Sigma Iotia III in 2168. The crew accidentally left behind a book entitled Chicago Mobs of the Twenties, which the highly impressionably Iotians used to initiate a new, violent society. It is presumed the Horizon was destroyed shortly after their stop on this planet.