- 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
Native of Juhraya, a Federation colony on the wrong side of the line after the Federation-Cardassian treaty. Marcias headed a Maquis cell and recruited Ro Laren. Cardassians killed him around 2370.