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)
James Westerfield Dr. Marvello Dr. Marvello See fewer	On the Waterfront (1954)
Melinda O. Fee Fenestra (as Melinda Fee) Fenestra (as Melinda Fee) See fewer	A Nightmare on Elm Street 2: Freddy's Revenge (1985)
Dawson Palmer The Cosmic Monster The Cosmic Monster See fewer	Voyage to the Bottom of the Sea (1964)
Michael Greene Nubu Nubu See fewer	To Live and Die in L.A. (1985)
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)
Harry Varteresian Vicho (uncredited) Vicho (uncredited) See fewer	Get Smart (1965)