Richard Basehart as Dr. Leonard Chaney

Gloria Grahame as Katherine

Lance Henriksen as Dr. Dan Bryan

JoJo D'Amore as Georgio

Trish Stewart as Nancy Chaney

Al Ferrara as Al

Donna Andresen as Sylvia Porter

Marilyn Joi as Miss Mathews

Katherine Fitzpatrick as Elevator Victim

Katherine Stewart as The Hitchhiker

Vic Tayback as Detective Simon

Simmy Bow as Ambulance Doctor

Arthur Space as Wino

Del Negro as Black Intern

Libby Chase as Libby

Barry Chase as Delivery Boy

Sally Marr as Landlady

Sandy Champion as Doctor in Corridor

Patsy Sublime as Miss Dunn

Barbara Sloane as Woman Bystander