- Star Trek: Inside the Roddenberry Vault
2016 (archive footage)
- Underground Entertainment: The Movie
2011 James (archive footage)
- The Duke
1999 Clive Chives
- Through Dead Eyes
1999 Barney Fredericks
- Bug Buster
1998 Sheriff Carlson
- Cold Fusion: Fire from Water
1998 Himself
- UFOs Above and Beyond
1997 Host
- Star Trek: Generations
1994 Captain Montgomery "Scotty" Scott
- Storybook
1994 Uncle Monty
- Amore!
1993 Dr. Landon
- National Lampoon's Loaded Weapon 1
1993 Scotty
- Double Trouble
1992 Chief O'Brien
- Star Trek VI: The Undiscovered Country
1991 Captain Montgomery 'Scotty' Scott
- Knight Rider 2000
1991 James 'Scotty' Doohan
- Star Trek V: The Final Frontier
1989 Captain Montgomery 'Scotty' Scott
- Star Trek IV: The Voyage Home
1986 Captain Montgomery 'Scotty' Scott
- Star Trek III: The Search for Spock
1984 Captain Montgomery 'Scotty' Scott
- Star Trek II: The Wrath of Khan
1982 Cmdr. Montgomery 'Scotty' Scott
- Star Trek: The Motion Picture
1979 Scotty
- Man in the Wilderness
1971 Benoit
- Pretty Maids All in a Row
1971 Follo
- Jigsaw
1968 Building Superintendent (uncredited)
- Space Seed
1967 Scott
- Fantastic Voyage
1966 Dr. Sawyer (Hypothermia technician) (uncredited)
- Scalplock
1966 Scrimp
- One of Our Spies Is Missing
1966 Phillip Bainbridge
- Bus Riley's Back in Town
1965 Les
- The Satan Bug
1965 Second Agent "X-Ray", scratches hand
- Willy McBean & His Magic Machine
1965 General Custer / Merlin / Excalibur (voice)
- 36 Hours
1964 Bishop (uncredited)
- The Wheeler Dealers
1963 Defense Attorney (uncredited)
- Flight Into Danger
1956 George Spencer
- Strike in Town
1955
