as Capt. Craig McKenzie / Cmdr. Glenn McKenzie
as Dr. Malic / Lt. Hastings
as Dr. Ken Tashiro
as Lucretia
as Dr. Jules Masson
as Perry Lawton
as Dr. Okada
as Tsuruko Okada
as Dr. Sugata
as Capt. Kroiga
as Dr. Anne Barton
as Chin
as Additional Voices (voice)
as Flying Lion/Giant Rat
as Man with Gun (uncredited)
as Advisor