George Peppard as Steve Mallory

Elizabeth Ashley as Alexandria Mallory

Roddy McDowall as Oliver Parsons

Arthur O'Connell as Dr. Wheeler

Mona Washbourne as Catherine Parsons

Herbert Marshall as Austin Parsons

Robert Webber as Dom Guardiano

Charles Drake as Lawrence Conway

Sally Kellerman as Holly Mitchell

Arte Johnson as Lester Aldrich

Bill Walker as Logan, Chauffeur

Vincent Gardenia as Preston

Janine Gray as Totti

Elaine Martone as Nurse

Hope Sansberry as Older Matron