Crack-Up

Peter Lorre

Colonel Gimpy

Brian Donlevy

Ace Martin

Helen Wood

Ruth Franklin

Ralph Morgan

John R. Flemyng

Thomas Beck

Joe Randall

Kay Linaker

Mrs. Fleming

Lester Matthews

Sidney Grant

Earle Foxe

Operative #30

J. Carrol Naish

Operative #77

Gloria Roy

Operative #16

Oscar Apfel

Alfred Knuxton

Paul Stanton

Daniel D. Harrington

Howard Hickman

Major White

Lynn Bari

Office Worker (uncredited)

Madge Bellamy

Secretary (uncredited)

William Benedict

Bunky, Office Boy (uncredited)