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 (1965)
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)
Daniel J. Travanti Space Hippie (as Dan Travanty) Space Hippie (as Dan Travanty) See fewer	Hill Street Blues (1981)
Linda Gaye Scott Alien Girl Alien Girl See fewer	Westworld (1973)
Bob May The Robot (uncredited) The Robot (uncredited) See fewer	The Red Skelton Hour (1951)
Stephan Merjanian Alien Hippie #4 (uncredited) Alien Hippie #4 (uncredited) See fewer	Muscle Beach Party (1964)
Joe E. Tata Short Alien (uncredited) Short Alien (uncredited) See fewer	The Time Tunnel (1966)
Dick Tufeld The Robot (voice) (uncredited) The Robot (voice) (uncredited) See fewer	Lost in Space (1998)