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)
Vincent Beck Megazor Megazor See fewer	And Justice for All (1979)
Fred Krone Invisibo (uncredited) Invisibo (uncredited) See fewer	Perry Mason (1957)
Bob May The Robot (uncredited) The Robot (uncredited) See fewer	The Red Skelton Hour (1951)
Jim Mills Voices (uncredited) Voices (uncredited) See fewer	Lost in Space (1965)
Joe E. Tata Robot Judge (voice) (uncredited) Robot Judge (voice) (uncredited) See fewer	The Time Tunnel (1966)
Dick Tufeld The Robot (voice) (uncredited) The Robot (voice) (uncredited) See fewer	Lost in Space (1998)