Trudy Marshall as Carol Northrup

Ronald Graham as Dr. Hugh Mayberry

Anthony Quinn as Michael Romanescue

Sheila Ryan as Jerry Dailey

Robert Bailey as Dr. Stephen Craig

Robin Raymond as Vicky O'Reilly

Doris Merrick as Susan

Carleton G. Young as Federal Investigator

Beverly Whitney as Helen

Jackie Paley as Adelaide

Jo-Carroll Dennison as Frieda

John Philliber as Mother Henry

Bess Flowers as Pedestrian looking for a taxi (uncredited)

Byron Foulger as Desk Clerk (uncredited)

Sue Moore as Taxi Driver (uncredited)

Mary Field as Nurse's Aide (uncredited)

Pierre Watkin as Dr. John Crane (uncredited)

Nella Walker as Mrs. Crane (uncredited)