Dean Jones

Professeur Albert Dooley

Sandy Duncan

Katie Dooley

Joe Flynn

Finley Hooper

Tony Roberts

Fred Hines

Lee Montgomery

Jimmy Dooley

Jack Kruschen

Doctor Gottlieb

Virginia Vincent

Eunice Hooper

Jack Bender

Arvin Wadlow

Billy Bowles

Orlo Wadlow

Sammy Jackson

Frisby

Arthur Hunnicutt

Mr. Purdham

Frank Wilcox

Mr. Meaker, the Bank Manager

Bryan O'Byrne

Bank Teller

Bing Russell

Mr. Smith

Peter Renaday

Mr. Beckert

Frank Cady

Assayer

George O'Hanlon

Parking Attendant

Jonathan Daly

Carter - Purchasing Agent

Hal Smith

Courthouse Guard

Edward Andrews

Morgan

Howard Culver

Morgan's Assistant (uncredited)

Maurice Dallimore

Englishman (uncredited)

Bernard Fox

Car Salesman (uncredited)

Arthur Franz

Prosecutor (uncredited)

Jerry Fujikawa

Japanese Official (uncredited)

Jonathan Hole

Refinery Agent (uncredited)

Hank Jones

Commencement Speaker (uncredited)

Jack Perkins

Agitated Driver #2 (uncredited)

Roy Roberts

The Judge (uncredited)

Fran Ryan

Mrs. Purdham (uncredited)

Jeffrey Sayre

Man in Refinery Office (uncredited)

Robert Shayne

Refinery Executive (uncredited)

Vaughn Taylor

Bank President (uncredited)

Bruno VeSota

Russian (uncredited)

Ted Jordan

Mr. Forbes

James Gregory

Rutledge