Dean Jones
Professeur Albert Dooley

Sandy Duncan
Katie Dooley

Joe Flynn
Finley Hooper

Tony Roberts
Fred Hines

James Gregory
Rutledge

Lee Montgomery
Jimmy Dooley

Jack Kruschen
Doctor Gottlieb

Virginia Vincent
Eunice Hooper

Jack Bender
Arvin Wadlow

Arthur Hunnicutt
Mr. Purdham

Frank Wilcox
Mr. Meaker, the Bank Manager

Bryan O'Byrne
Bank Teller

Ted Jordan
Mr. Forbes

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

Maurice Dallimore
Englishman (uncredited)

Bernard Fox
Car Salesman (uncredited)

Arthur Franz
Prosecutor (uncredited)

Jerry Fujikawa
Japanese Official (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)