Carol White as Cathy Palmer

Paul Burke as Jack Byrnes

Mala Powers as Meg Stone

Scott Hylands as Kenneth Daly

James B. Sikking as Joe Menchell

Walter Brooke as Jerry Wolfe

Mathilda Calnan as Ilsa (as Matilda Calnan)

Gene Lyons as Dr. Blanker

Dennis Patrick as Dr. Parkington

Barry Cahill as FBI Agent Crosley

Andrea King as Brenda Frazier (uncredited)

Edith Atwater as Hospital Desk Nurse (uncredited)

Ron Masak as Paul Fleming (uncredited)

Harry Holcombe as Inspector Dixon (uncredited)

Leoda Richards as Restaurant Patron