Michael Landon and Dick Martin in Rowan & Martin's Laugh-In (1967)

Michael Landon and Dennis Allen in Rowan & Martin's Laugh-In (1967)

Michael Landon and Ruth Buzzi in Rowan & Martin's Laugh-In (1967)

Michael Landon in Rowan & Martin's Laugh-In (1967)

Michael Landon in I Was a Teenage Werewolf (1957)

Michael Landon and Betty White in The Pet Set (1971)

Jack Klugman, Michael Landon, Richard Dawson, Anita Gillette, Vicki Lawrence, Jo Ann Pflug, and Gene Rayburn in Match Game (1973)

Jason Bateman, Michael Landon, and Melissa Francis in Little House on the Prairie (1974)

Michael Landon in Little House on the Prairie (1974)

Michael Landon and Art Carney in Where Pigeons Go to Die (1990)

Michael Landon, Victor French, and Kent McCray in Highway to Heaven (1984)

Michael Landon, Dick Martin, and Dan Rowan in Rowan & Martin's Laugh-In (1967)

Lorne Greene, Michael Landon, Dan Blocker, and Pernell Roberts in Bonanza (1959)

Lorne Greene, Michael Landon, and Dan Blocker in Bonanza (1959)