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)
Lew Gallo Commander Fletcher Commander Fletcher See fewer	I Now Pronounce You Chuck & Larry (2007)
Don Eitner Sergeant Smith Sergeant Smith See fewer	Sofi (1968)
John Hunt First Stone Monster / Spike Monster (uncredited) First Stone Monster / Spike Monster (uncredited) See fewer	Hawaii Five-O (1968)
Bart La Rue Illusion Machine (voice) (uncredited) Illusion Machine (voice) (uncredited) See fewer	Satan War (1979)
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)