Ray Milland as Maxwell Kirshner

Rosey Grier as Jack Moss

Don Marshall as Dr. Fred Williams

Roger Perry as Dr. Philip Desmond

Chelsea Brown as Lila

Kathrine Baumann as Patricia

John Dullaghan as Thomas

John Bliss as Donald

Bruce Kimball as Police Lieutenant

Jane Kellem as Miss Mullen

Lee Frost as Sergeant Hacker

Wes Bishop as Dr. Smith

Roger Gentry as Police Sergeant

Britt Nilsson as Nurse

Rick Baker as Gorilla

Phil Hoover as Policeman

Rod Steele as Medical Salesman

Michael Viner as Prison Guard

William Smith as Hysterical Condemned Man

Jerry Butler as Prison Guard

George E. Carey as Mitch

Tommy Cook as Priest

Albert Zugsmith as Cameo

Dick Whittington as TV Newscaster

Ron Gans as Reporter in Tan Coat (uncredited)

Joan Prather as Nurse (uncredited)

Ray Sebastian as Policeman in Car 219 (uncredited)