- 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
Executive officer at the Utopia Planitia Shipyards in 2371, formerly Kathryn Janeway's exacting professor of fractal calculus at Starfleet Academy. He developed a paternal affection for Janeway, and escorted her onto U.S.S. Voyager for the first time.