Stuart Whitman

Dale Nelson / Arthur

Carol Lynley

Cynthia Lee Albright

Roddy McDowall

Martin Ashley

Lauren Bacall

Dr. Edwina Beighley

Olive Deering

Mrs. Mellon

Ossie Davis

Capshaw

Donald Buka

Psychologist

Paulene Myers

Dr. Walden (as Pauline Myers)

Robert J. Wilke

Technician Mike Newton (as Robert Wilke)

Bert Freed

Frank Josephson

Jonathan Gilmore

A Young Mental Patient

Templeton Fox

Miss Lindsey