John Loder as Captain Craig Killian

Ruth Ford as Janet Devon

Marian Hall as Patricia 'Pat' Devon

Richard Fraser as Lieutenant Walter Sibley

Paul Cavanagh as Dr. Dorn

Lumsden Hare as General Randall Devon

John Abbott as Dr. Ferris

Mary Field as Nurse Kruger

Rex Williams as Eric - Male Nurse

Joan Winfield as Mrs. Ellen Tanner

Charles Irwin as Inspector Cady

Peggy Carson as Marie Oliver - the Maid

Walter Tetley as Sammy

Creighton Hale as Constable Fletcher

Frank Mayo as Constable Ryan

Vera Lewis as Landlady (uncredited)