Kevin McCarthy

Dr. Miles J. Bennell

Dana Wynter

Becky Driscoll

King Donovan

Jack Belicec

Carolyn Jones

Theodora 'Teddy' Belicec

Larry Gates

Dr. Dan 'Danny' Kauffman

Kenneth Patterson

Stanley Driscoll

Virginia Christine

Wilma Lentz

Jean Willes

Nurse Sally Withers

Ralph Dumke

Police Chief Nick Grivett

Guy Way

Officer Sam Janzek

Bobby Clark

Jimmy Grimaldi

Beatrice Maude

Grandma Grimaldi

Whit Bissell

Emergency Room Psychiatrist

Richard Deacon

Emergency Room Doctor

Robert Osterloh

Ambulance Attendant

Guy Rennie

Restaurant Owner

Eileen Stevens

Anne Grimaldi

Tom Fadden

Uncle Ira Lentz

Jean Andren

Eleda Lentz

Everett Glass

Dr. Ed Pursey

Sam Peckinpah

Charlie the Meter Reader

Dabbs Greer

Mack Lomax

Marie Selland

Martha Lomax

Harry J. Vejar

Man carrying pods in Mile's office (extra)

J. Pat O'Malley

Railroad Baggage Handler (extra)

Richard Deacon

Dr. Harvey Bassett (uncredited)

Frank Hagney

Townsman (uncredited)

Robert Osterloh

Ambulance Driver (uncredited)

Robert S. Eisen

Editor

Daniel Mainwaring

Screenplay

Ellsworth Fredericks

Director of Photography

Jack Finney

Novel

Don Siegel

Director

Richard Collins

Screenplay

Carmen Dragon

Original Music Composer

Joseph Kish

Set Decoration

Ted Haworth

Production Design

Irva Mae Ross

Script Supervisor

Mary Westmoreland

Hairstylist

Milt Rice

Special Effects

Emile LaVigne

Makeup Artist

Richard Maybery

Assistant Director

Jerry Irvin

Music Editor

Ralph Butler

Sound

Allen K. Wood

Production Manager

William Beaudine Jr.

Assistant Director

Del Harris

Sound Editor

Walter Wanger

Producer