Clint Howard
Balok
John Gabriel
Crewman (uncredited)
Eddie Paskey
Lieutenant Leslie (uncredited)
Vic Perrin
Nomad (voice)
Walker Edmiston
Balok (voice) (uncredited)
Anthony D. Call
Dave Bailey
Ted Cassidy
Balok's puppet (voice)
Frank da Vinci
Clifford Brent
Ron Veto
Harrison
Bruce Mars
Crewman
Sean Morgan
