
A gangster running a protection racket gets information that he's about to be prosecuted on income-tax-evasion charges. He hires a man with a photographic memory to memorize his books, then destroys them all so the police won't have any evidence to link him to the racket.
Donna Wells

Prof. J. Thomas Quincy

Gabby Walsh

Johnny Reilly

Louie Pozowicz

Slater

Milly

Duke Talbot

Monk

Chief Detective W. A. Barlow

Rabbit

Mrs. Bowse

Bob 'Pops' Wilson
Professor Dinwiddle