(archive footage)
Star Trek: Inside the Roddenberry Vault (2016)
Leonard McCoy (archive footage)
The Pixar Story (2007)
Self
40 Years of Star Trek (2006)
Viking 1 (voice)
The Brave Little Toaster Goes to Mars (1998)
Trekkies (1997)
The Making of Star Trek Deep Space Nine Trials And Tribble-ations (1996)
William Shatner's Star Trek Memories (1995)
William Shatner: Captain's Log (1994)
Himself
Star Trek: A Captain's Log (1994)
A Conversation with DeForest Kelley (1993)
Dr. Leonard 'Bones' McCoy
Star Trek VI: The Undiscovered Country (1991)
Star Trek: 25th Anniversary Special (1991)
Star Trek V: The Final Frontier (1989)
McCoy
Star Trek IV: The Voyage Home (1986)
Star Trek III: The Search for Spock (1984)
Star Trek II: The Wrath of Khan (1982)
Star Trek: The Motion Picture (1979)
The Star Trek Dream (1975)
Elgin Clark
Night of the Lepus (1972)
Ben Tully
The Bull of the West (1972)
Bill Rile
Waco (1966)
Tully
Bonanza: Ride the Wind (1966)
Toby Jack Saunders
Apache Uprising (1965)
Guy Tavenner
Town Tamer (1965)
Sheriff Dal Nemo
Black Spurs (1965)
Sam Corwin
Where Love Has Gone (1964)
Amos Troop
Gunfight at Comanche Creek (1963)
Curley Burne
Warlock (1959)
Wexler
The Law and Jake Wade (1958)
Southern Officer
Raintree County (1957)
Lambert
The Edge of Innocence (1957)
Morgan Earp
Gunfight at the O.K. Corral (1957)
Jim Breck
Tension at Table Rock (1956)
Jim - Hotel Clerk
The View from Pompey's Head (1955)
Edward Clary (as DeForest Kelly)
Illegal (1955)
Charlie (uncredited)
House of Bamboo (1955)
Eddie Lee
Duffy of San Quentin (1954)
Fred (uncredited)
Taxi (1953)
Dr. Sherman (uncredited)
The Men (1950)
Ted
Speak No Evil (1950)
Lt. Glenson (uncredited)
Malaya (1949)
'Ace' Martin
Duke of Chicago (1949)
Smalley
Canon City (1948)
Bob Rogers
Beyond Our Own (1947)
Bob Kirby
Variety Girl (1947)
Vince Grayson
Fear in the Night (1947)
Peter
Time to Kill (1945)