Victor Buono

Leo Kroll

David McLean

Lt. Frank Benson

Diane Sayer

Barbara Wells

Davey Davison

Tally Raymond

Baynes Barron

Sgt. Mack Clyde

Ellen Corby

Mrs. Kroll

Russ Bender

Dr. Clarence Sanford

Jeanne Bates

Clara Thomas

Mimi Dillard

Thelma

Selette Cole

Helen Lawson

Michael Ryan

Detective Mel Posner

Wally Campo

Eggerton

Byron Morrow

Dr. Morton

John Yates

Intern

James B. Sikking

Police Sketch Artist

Robert Cranford

Jack Rosten

Fred Aldrich

Apartment House Manager (uncredited)

Benjie Bancroft

Police Officer (uncredited)

Fred Fisher

Detective (uncredited)

Kenner G. Kemp

Detective (uncredited)

Victor Masi

Attendant (uncredited)