Sidney Poitier as Doctor

Bobby Darin as Patient

Peter Falk as Young Psychiatrist

Carl Benton Reid as Chief Medical Officer

Mary Munday as Bar Hostess

Howard Caine as Tavern Owner

Gilbert Green as Jewish Father

Barry Gordon as Patient (as a boy)

Richard Bakalyan as Jimmy

Lynn Loring as Jewish Girl

Anne Barton as Mother

James Anderson as Father

Benjie Bancroft as

Bud Cokes as

Jimmie Horan as Patient

Clegg Hoyt as Pete

Frank Maxwell as Bund Meeting Spectator

William H. O'Brien as Bund Meeting Spectator

Butch Patrick as Imaginary Playmate

Yvette Vickers as Drunken Woman

Duke Fishman as

Lars Hensen as

Michael Jeffers as

Ethan Laidlaw as

Tiger Joe Marsh as

Clyde McLeod as

Mike Morelli as

George Murdock as

Gil Perkins as

Jack Perrin as

Herman Rudin as

Phil Schumacher as

Max Wagner as

Chalky Williams as

Harry Wilson as