William Castle Director Christopher George Hagen Arnold Actor Greta Baldwin Karen Summers Actor Henry Jones Dr. Crowther Actor Harold Gould Col. Holt Actor Phillip Pine Lee Craig Actor Lee Delano Dr. Tony Verity Actor Ivan Bonar Col. Cowen Actor Robert Cleaves Dr. George Tarvin Actor Charles Irving Maj. Tolley Actor Sheila Bartold Sybil Dennis Actor Patrick Wright Stover Actor Mary Esther Denver Overseer Actor Keye Luke Sen Chiu Actor Ed Prentiss Hicks Actor