- Us (1991) (TV) …. Jeff Hayes
- Where Pigeons Go to Die (1990) (TV) …. Hugh as adult
- Highway to Heaven …. Jonathan Smith (71 episodes, 1984-1989)
- Sam’s Son (1984) …. Gene Orman
- Little House: The Last Farewell (1984) (TV) …. Charles Ingalls
- Little House: Bless All the Dear Children (1983) (TV) (voice) (uncredited) …. Charles Ingalls
- Little House: Look Back to Yesterday (1983) (TV) …. Charles Ingalls
- Love Is Forever (1983) (TV) …. John Everingham
- Little House on the Prairie …. Charles Ingalls (182 episodes, 1974-1983)
- Disneyland …. Host (1 episode, 1981)
- Little House Years (1979) (TV) …. Charles Ingalls
- The Loneliest Runner (1976) (TV) …. John Curtis - as an Adult
- Little House on the Prairie (1974) (TV) …. Charles Ingalls
- Bonanza …. Joseph ‘Little Joe’ Cartwright / … (388 episodes, 1959-1973)
- The Electric Company (1 episode, 1973)
- The Special London Bridge Special (1972) …. Tennis Player
- Swing Out, Sweet Land (1970) (TV) …. Peter Minuit
- Luke and the Tenderfoot (1965) (TV) …. Tough
- Johnny Staccato …. Freddie Tate (1 episode, 1959)
- The Legend of Tom Dooley (1959) …. Tom Dooley
- The Rifleman …. Billy Mathis / … (2 episodes, 1958-1959)
- Playhouse 90 …. Arthur Doner (1 episode, 1959)
- Tombstone Territory …. Barton Clark / … (2 episodes, 1958-1959)
- Wanted: Dead or Alive …. Carl Martin / … (2 episodes, 1958-1959)
- Frontier Doctor …. Jim Mason (1 episode, 1959)
- Zane Grey Theater …. Dan / … (2 episodes, 1957-1959)
- Trackdown …. Jack Summers (2 episodes, 1958)
- Maracaibo (1958) …. Lago Orlando
- The Texan …. Nick Ahearn (1 episode, 1958)
- God’s Little Acre (1958) …. Dave Dawson
- Studio One …. Rafael Martinez (1 episode, 1958)
- Alcoa Theatre …. Johnny Risk (1 episode, 1958)
- Schlitz Playhouse of Stars …. Don Burns (3 episodes, 1957-1958)
- High School Confidential! (1958) …. Steve Bentley
- Goodyear Theatre (1 episode, 1958)
- Cheyenne …. Alan Horn / … (2 episodes, 1956-1958)
- U.S. Marshal …. Don Sayers (1 episode)
- Tales of Wells Fargo …. Tad Cameron / … (3 episodes, 1957)
- Suspicion …. Howard (1 episode, 1957)
- The Court of Last Resort …. Thomas Forbes (1 episode, 1957)
- I Was a Teenage Werewolf (1957) …. Tony Rivers (The Teenage Werewolf)
- State Trooper …. Joe Durando / … (2 episodes, 1957)
- General Electric Theater …. Claude / … (2 episodes, 1957)
- Telephone Time …. Benny Leonard (2 episodes, 1956-1957)
- The 20th Century-Fox Hour …. Eddie (1 episode, 1957)
- Fight for the Title (1957) …. Kid Lombard
- Wire Service …. Pietro (1 episode, 1956)
- Crusader …. Dick (1 episode, 1956)
- The Adventures of Jim Bowie …. Armand De Nivernais / … (2 episodes, 1956)
- Crossroads …. Danny / … (2 episodes, 1956)
- Sheriff of Cochise (1 episode, 1956)
- These Wilder Years (1956) (uncredited) …. Boy in poolhall
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