Walter Koenig
- Raging Midlife
2025 Otis
- Star Trek: Picard - The IMAX Live Series Finale Event
2023 Anton Chekov (voice)
- Unbelievable!!!!!
2020 Fireman Frank
- Star Trek: Picard
2020 President Anton Chekov (voice)
- Diminuendo
2018 Milton Green
- Neil Stryker and The Tyrant of Time
2017 Ray Nabroski (future)
- Cowboys & Engines
2015 Professor Timéon
- Star Trek: Renegades
2015 Admiral Chekov
- Blue Dream
2013 Lassie
- Handball
2012 Producer
- Bone Eater
2008 Coogan
- InAlienable
2008 Writer
- Mad Cowgirl
2006 Pastor Dylan
- Maximum Surge
2003 Drexel
- Drawing Down the Moon
2000 Joe Merchant
- Son of the Beach
2000
- Futurama
1999 Walter Koenig (voice)
- Sworn to Justice
1996 Dr. Breitenheim
- Almost Perfect
1995
- Star Trek: Generations
1994 Commander Pavel Chekov
- Babylon 5
1994 Alfred Bester
- Diagnosis: Murder
1993 Quinn Trask
- Star Trek: Deep Space Nine
1993 Ensign Pavel Chekov
- Star Trek VI: The Undiscovered Country
1991 Cmdr. Pavel Chekov
- Star Trek V: The Final Frontier
1989 Cmdr. Pavel Chekov
- Moontrap
1989 Col. Jason Grant
- Star Trek IV: The Voyage Home
1986 Cmdr. Pavel Chekov
- The Real Ghostbusters
1986 Vladimir Maximov / Followers (voice)
- Star Trek III: The Search for Spock
1984 Cmdr. Pavel Chekov
- Antony and Cleopatra
1983 Pompey
- Star Trek II: The Wrath of Khan
1982 Cmdr. Pavel Chekov
- The Powers of Matthew Star
1982 Writer
- The Starlost: The Alien Oro
1980 Oro
- Star Trek: The Motion Picture
1979 Chekov
- Family
1976 Writer
- Nightmare Honeymoon
1974 Deputy Sheriff
- The Questor Tapes
1974 Administrative Assistant
- Land of the Lost
1974 Writer
- The Starlost
1973 Oro
- Star Trek
1973 Writer
- Goodbye, Raggedy Ann
1971 Jerry
- Columbo
1971 Sergeant Johnson
- Mannix
1967
- Ironside
1967
- Star Trek
1966 Pavel Chekov
- Jericho
1966
- Gidget
1965
- Mr. Novak
1963 Alexsei Dubov
- The Lieutenant
1963 Sgt. John Delwyn
- The Alfred Hitchcock Hour
1962 Tiger
- Ben Casey
1961
- The Untouchables
1959 Student (uncredited)
