Fredric March

Character: Dr. Joseph Pearson

Ben Gazzara

Character: Dr. David Coleman

Dick Clark

Character: Dr. Alexander

Ina Balin

Character: Cathy Hunt

Eddie Albert

Character: Dr. Charles Dornberger

Phyllis Love

Character: Mrs. Elizabeth Alexander

Edward Andrews

Character: Jim Bannister

Aline MacMahon

Character: Dr. Lucy Grainger

Arthur Hill

Character: Tomaselli

Rosemary Murphy

Character: Miss Graves

Barnard Hughes

Character: Dr. Kent O'Donnell

Joseph Bova

Character: Dr. Shawcross

George Segal

Character: Dr. Howard

Matt Crowley

Character: Dr. Rufus

Dolph Sweet

Character: Police Car Driver

Ella Smith

Character: Physician

Nora Helen Spens

Character: Physician (as Nora Helen Spens M.D.)

Robert Dahdah

Character: Physician

Ronald Reagan

Character: Narrator (voice)

Dick Button

Character: Operating Intern