Ib Melchior Director Preston Foster Dr. Erik von Steiner Actor Philip Carey Dr. Steve Connors Actor Merry Anders Carol White Actor John Hoyt Dr. Varno Actor Dennis Patrick Councilman Willard Actor Joan Woodbury Gadra Actor Delores Wells Reena Actor Steve Franken Danny McKee Actor Gloria Leslie Councilwoman Actor Peter Strudwick The Mutant Actor Margaret Seldeen Miss Hollister Actor Forrest J. Ackerman Square-frame technician Actor William Redlin Producer