Full Credits
45 members

Gregory Peck
David Stillwell

Diane Baker
Shela

Walter Matthau
Ted Caselle

Robert H. Harris
Dr. Broden

Kevin McCarthy
Sylvester Josephson

Leif Erickson
The Major

Walter Abel
Charles Stewart Calvin

George Kennedy
Willard

Jack Weston
Lester

Anne Seymour
Frances Calvin

House Jameson
Bo

Hari Rhodes
Lt. Franken
Syl Lamont
Benny

Eileen Baral
Irene
Neil Fitzgerald
Joe Turtle

Franklin Cover
Group Leader
Don Anderson

Bill Baldwin
Al Beaudine
Roxane Berard

Robert Brubaker
Toni Covington
John Crowther
Robert Dahdah

Ann Doran
Tenant in Apartment 3R (uncredited)

Jerry Dunphy

Douglas Evans
Harry Fleer

Rian Garrick

Gerald Gordon

Damian O'Flynn
Bar Patron (uncredited)
John Pedrini

Barbara Perry
Office worker (uncredited)
Murray Pollack
Detective (uncredited)

Bill Quinn
Eddie - Bartender (uncredited)
Allan Ray

Walter Reed
Reporter (uncredited)
Victor Romito
George Simmons
Ann Staunton
Bert Stevens
Robert Swan
Police Sergeant (uncredited)

Aline Towne
Dr. Broden's Receptionist (uncredited)

Howard Wendell

Myron Healey
Bar Patron Discussing Watermelon (voice) (uncredited)
15 members
Edward Dmytryk
Director
Howard Fast
Novel
Peter Stone
Screenplay
Harry Keller
Producer
Joseph MacDonald
Director of Photography
Quincy Jones
Original Music Composer
John McCarthy Jr.
Set Decoration
John P. Austin
Set Decoration
Alexander Golitzen
Art Direction
Frank Arrigo
Art Direction
Jean Louis
Costume Design
Larry Germain
Hairstylist
Bud Westmore
Makeup Artist
Ted J. Kent
Editor
Buddy Van Horn
Stunts