Attore

• Civilization IV (2005) (VG) (voce) .... Narrator
• Pubblicita 'Priceline' 2004 .... nella parte di "Se' Stesso"
• Mind Meld: Secrets Behind the Voyage of a Lifetime (2001) (V) .... nella parte di "Se' Stesso"
• Minyan in Kaifeng (2001) (voce) .... Narratore
• History Happened Here (2001) (V) .... nella parte di "Se' Stesso" (Narratore)
• Rashi Atlantis: The Lost Empire (2001) (voce) .... Atlantian King
• Sinbad: Beyond the Veil of Mists (2000) (voce) .... Akron/Baraka/King Chandra
• Y2K Family Survival Guide (1999) .... Narratore
• First Men on the Moon, The (1999) (V) .... The inventor
• Rashi: A Light After the Dark Ages (1999) (voce) .... Rashi
• Sinbad: Beyond the Veil of Mists (1999) (voce) .... Akron/Baraka
• Star Trek: Secret of Vulcan Fury (1999) (VG) (voce) .... Mr. Spock
• Brave New World (1998/I) (TV) .... Mustapha Mond
• Armageddon: Target Earth (1998) .... Narratore
• Invasion America (1998) (voce) .... General Konrad
• Trekkies (1998) .... Spock/Se stesso
• David (1997) (TV) .... Samuel
• Life Apart: Hasidism in America, A (1997) (voce) .... Narratore
• Carpati: 50 Miles, 50 Years (1996) .... Narratore
• Bonanza: Under Attack (1995) (TV) .... Frank James
• Pagemaster, The (1994) (voce) .... Dr. Jekyll & Mr. Hyde
• Destiny in Space (1994) (voce) .... Narratore
• Titanica (1992) .... Narratore
• Star Trek 25th Anniversary Special (1991) (TV) .... Ospite
• Star Trek VI: The Undiscovered Country (1991) .... Spock
• Never Forget (1991) (TV) .... Mel Mermelstein
• Ring of Fire (1991/II) .... Narratore
• Ancient Mysteries .... Conduttore
• Bangles Greatest Hits (1990) .... Autista
• Star Trek V: The Final Frontier (1989) .... Spock
• Star Trek IV: The Voyage Home (1986) .... Spock
• Transformers: The Movie, The (1986) (voce) .... Galvatron
• Star Trek III: The Search for Spock (1984) .... Spock/Voce Ascensore (as Frank Force)
• "Sun Also Rises, The" (1984) (mini) TV Series .... Count Mippipopolous
• Aladdin and His Wonderful Lamp (1984) (TV)
• Star Trek: The Wrath of Khan (1982) .... Captain Spock
• "Marco Polo" (1982) (mini) TV Series .... Achmet
• Woman Called Golda, A (1982) (TV) .... Morris Meyrson
• Leonard Nimoy Demonstrates the Magnavision Videodisc Player (1981) ... se stesso
• Seizure: The Story of Kathy Morris (1980) (TV)
• Star Trek: The Motion Picture (1979) .... Mr. Spock
• Invasion of the Body Snatchers (1978) .... Dr. David Kibner
• "Coral Jungle, The" (1976) TV Series (Narratore)
• "In Search Of" (1976) TV Series (Narratore)
• Missing Are Deadly, The (1974) (TV)
• "Star Trek: The Animated Series" (1973) TV Series (Voce) .... Mr. Spock
• Alpha Caper, The (1973) (L'ultimo colpo dell'ispettore Clark) (TV) .... Mitch
• Columbo: A Stitch in Crime (1973) (TV) .... Dr. Mayfield
• Baffled! (1972) (TV) .... Tom Kovack
• Catlow (1971) .... Miller
• Assault on the Wayne (1970) (TV) .... Commander Phil Kettenring
• "Mission: Impossible" (1966) TV Series .... Paris (1969-1971)
• "Star Trek" (1966) TV Series .... Commander Spock
• Star Trek - Where No Man Has Gone Before (1966) (TV) .... Mr. Spock
• Deathwatch (1966)
• Valley of Mystery (1966)
• Star Trek (1965) (TV) .... Mister Spock
• Death Valley Days (1965)
• Seven Days in May (1964).... comparsa
• "General Hospital" (1963) TV Series .... Bernie (1963)
• Balcony, The (1963) .... Rebel leader
• Brain Eaters, The (1958) (come Leonard Nemoy) .... Professor Cole
• Satan's Satellites (1958) .... Narab
• Combat Psychiatry (1954) .... Marine
• Them! (1954) .... Telex operator
• Old Overland Trail (1953) .... Black Hawk
• Francis Goes to West Point (1952) ... Cadetto
• Kid Monk Baroni ... Paul 'Monk' Baroni (1952)
• Zombies of the Stratosphere (1952) .... Narab
• Queen for a Day... Chief (1951)
• Rhubarb (1951) (comparsa) .... Young ballplayer