- 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
Owner and pilot of a small spacecraft borrowed by Harcourt Fenton Mudd. Under questioning, Mudd claimed to be Walsh. Mudd later testified that Walsh had become unexpectedly incapacitated.