Richard Widmark as Dr. Stewart 'Mac' McIver

Lauren Bacall as Meg Faversen Rinehart

Charles Boyer as Dr. Douglas N. Devanal

Gloria Grahame as Karen McIver

Lillian Gish as Victoria Inch

John Kerr as Steven W. Holte

Susan Strasberg as Sue Brett

Oscar Levant as Mr. Capp

Paul Stewart as Dr. Otto Wolff

Jarma Lewis as Lois Y. Demuth

Adele Jergens as Miss Cobb

Edgar Stehli as Mr. Holcomb

Sandy Descher as Rosemary McIver

Bert Freed as Abe Irwin

Mabel Albertson as Regina Mitchell-Smyth

Fay Wray as Edna Devanal

Oliver Blake as Curly

Olive Carey as Mrs. O'Brien - Nurse

Eve McVeagh as Mrs. Shirley Irwin

Tommy Rettig as Mark

Virginia Christine as Sally

Jan Arvan as Mr. Appleton

Ruth Clifford as Mrs. Jenkins

Myra Marsh as Miss Gavney

James Westerfield as James Petlee

Marjorie Bennett as Sadie

Stuart Holmes as Mr. Wietz

Roy Barcroft as Police Lieutenant Ferguson (Uncredited)

Dayton Lummis as Dr. Tim Carmody (Uncredited)

John Bennes as Albert (Uncredited)

Harry Harvey Jr. as Messenger (Uncredited)

Ed Agresti as Barber (Uncredited)

Harry Landers as Intern (Uncredited)

John McKee as Deputy Sheriff (Uncredited)

Norman Ollestad as Usher (Uncredited)

Scott Seaton as Board Member (Uncredited)

Lomax Study as Waiter (Uncredited)

Lenore Kingston as Switchboard Operator (Uncredited)

Patricia Miller as Telephone Operator (Uncredited)

Wilbur Mack as Concertgoer (Uncredited)

Leoda Richards as Concertgoer (Uncredited)

Murray Pollack as Concertgoer (Uncredited)

James Conaty as Concertgoer (Uncredited)

Henry Sylvester as Patient (Uncredited)

Alvin Greenman as Patient (Uncredited)

Kay E. Kuter as Patient (Uncredited)

Moria Turner as Patient (Uncredited)