Dr. Eric Vornoff, with the help of his mute assistant Lobo, captures twelve men for a grisly experiment; His goal to turn them into supermen using atomic energy. Reporter Janet Lawton, fiancée of the local lieutenant, vows to investigate Vornoff's supposedly haunted house.
Bela Lugosi
as Dr. Eric Vornoff
Tor Johnson
as Lobo
Tony McCoy
as Lt. Dick Craig
Loretta King
as Janet Lawton
Harvey B. Dunn
as Capt. Robbins
George Becwar
as Prof. Strowski
Paul Marco
as Kelton
Don Nagel
as Martin
Bud Osborne
as Mac
John Warren
as Jake
Ann Wilner
as Tillie
Dolores Fuller
as Margie
