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)
Ron Gans Alien Leader (as Ronald Gans) Alien Leader (as Ronald Gans) See fewer	Pryde of the X-Men (1989)
Lyle Waggoner Mechanical Man I Mechanical Man I See fewer	Surf II (1983)
Ralph Lee Mechanical Man II Mechanical Man II See fewer	The Stripper (1963)
Sue England Female Robot (voice) (uncredited) Female Robot (voice) (uncredited) See fewer	Funny Face (1957)
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)