Name	Known for
Guy Williams Dr. John Robinson Dr. John Robinson See fewer	Lost in Space (1965)
June Lockhart Maureen Robinson Maureen Robinson See fewer	Lost in Space (1965)
Mark Goddard Major Don West Major Don West See fewer	Lost in Space (1998)
Marta Kristen Judy Robinson Judy Robinson See fewer	Lost in Space (1998)
Bill Mumy Will Robinson (as Billy Mumy) Will Robinson (as Billy Mumy) See fewer	Babylon 5 (1993)
Angela Cartwright Penny Robinson Penny Robinson See fewer	The Sound of Music (1965)
Jonathan Harris Dr. Zachary Smith Dr. Zachary Smith See fewer	Lost in Space (1965)
Walter Burke Mr. O. M. Mr. O. M. See fewer	Support Your Local Sheriff! (1969)
Fritz Feld Mr. Zumdish Mr. Zumdish See fewer	Bringing Up Baby (1938)
Larry Dean Wooden Soldier Wooden Soldier See fewer	Cyborg 2087 (1966)
Tiger Joe Marsh Security Guard Security Guard See fewer	Escape to Witch Mountain (1975)
Dawson Palmer Monster Monster See fewer	Voyage to the Bottom of the Sea (1964)
Bob May The Robot (uncredited) The Robot (uncredited) See fewer	The Red Skelton Hour (1951)
Dick Tufeld The Robot (voice) (uncredited) The Robot (voice) (uncredited) See fewer	Lost in Space (1998)