Acting
- 2021The Center Seat: 55 Years of Star TrekSelf4 ep.
- 2012Alien EncountersSelf - Author2 ep.
- 1973Star TrekEM / 3 / Green (voice) (uncredited)2 ep.
Behind the camera
- 2004Da Boom CrewWriter2 ep.
- 1995SlidersWriter1 ep.
- 1994Babylon 5Writer1 ep.
- 1986The Real GhostbustersWriter2 ep.
- 1985The Twilight ZoneWriter2 ep.
- 1984Tales from the DarksideWriter2 ep.
- 1983The BiskittsWriter1 ep.
- 1977Logan's RunWriter1 ep.
- 1974Land of the LostWriter2 ep.
- 1973Star TrekWriter2 ep.
- 1966Star TrekWriter3 ep.
Guest appearances
- 2021The Center Seat: 55 Years of Star TrekSelf6 ep.
- 1987Star Trek: The Next Generation1 ep.
- 1973Star TrekEM / 3 / Green (voice) (uncredited), Security Ensign (voice) (uncredited)2 ep.