- 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
Politically powerful man on a world like ancient Rome. Marcus gave R. M. Merrick power and position in 2261, but failed to interest Kirk, Spock and McCoy with similar trappings in 2267.