George Segal as Harry Benson

Joan Hackett as Dr. Janet Ross

Richard Dysart as Dr. John Ellis

Donald Moffat as Dr. Arthur McPherson

Michael C. Gwynne as Dr. Robert Morris

William Hansen as Dr. Ezra Manon

Jill Clayburgh as Angela Black

Norman Burton as Det. Capt. Anders

James B. Sikking as Ralph Friedman

Matt Clark as Gerhard

Jim Antonio as Richards

Steve Kanaly as Edmonds

Al Checco as Farley

Gene Borkan as Benson's Guard

Burke Byrnes as Benson's Guard

Fred Sadoff as Police Doctor

Robert Ito as Anesthetist

Jason Wingreen as Instructor

Jack Colvin as Detective

Jordan Rhodes as First Questionnaire

Ian Wolfe as Priest

Dee Carroll as Night Nurse

Rutanya Alda as Nurse

Lee de Broux as Reporter

George Holmes as Reporter

Michael Jeffers as Reporter

Joe Pine as Reporter

Bob Harks as Orderly

Victor Argo as Orderly

Clark Ross as Orderly

Michael Santiago as Orderly

Nicholas Worth as Orderly