Chester Morris

as Self

as Ted

as William 'Bill' / 'Willie' Legendre Jr.

as John Morgan

as Hugh Clements

as Bill Brooks

as Pop Weaver

as Dr. Carlo Lombardi

as Detective Anderson

as Chick Williams

as Mr. Hull

as R. Burton "Danny" Jones

as Tom Monahan

as Tony

as Robert 'Bob' Sangster

as Hal Wilson

as Boston Blackie

as John Hawks

as Horatio 'Boston Blackie' Black

as Boston Blackie

as Doctor Craig

as Frank Manfred

as Jack Feeney

as Jeffrey Andrews

as Jimmie Martin

as Self (archive footage)

as Edwards

as Neil Broderick

as Self

as Jimmie 'Office Boy' Burnham

as Pirate Captain (uncredited)

as Frank Simmons

as Jeff Crane

as Horatio 'Boston Blackie' Black / Cyrus Peyton

as Horatio 'Boston Blackie' Black

as Boston Blackie

as Boston Blackie

as Chester Morris

as Detective Humphrey Campbell

as Nickey Solomon

as Albert DeWitt

as Horatio 'Boston Blackie' Black

as Boston Blackie

as Horatio 'Boston Blackie' Black

as Horatio 'Boston Blackie' Black

as Jeff Gallagher

as Horatio 'Boston Blackie' Black

as Ray Malone

as Jeff Morrell

as Lt. Jim Malone

as John 'Doc' Madison

as Lefty

as Horatio 'Boston Blackie' Black

as 'Rocky' Blake

as Steve Farrell

as Pete Ramsey

as Foxy Pattis

as Jimmie Burnham in 'The Gay Bride' (archive footage)

as Self

as Horatio 'Boston Blackie' Black

as Self (archive footage)

as Larry Burke

as Paul Smith

as Gene Fillmore

as Ross Hadley

as Robert Mason

as Performer in $20 Bet Sketch and 'Bicycle Built for Two' Numbers

as The Dansker

as Eric Foster

as Kenneth 'Ken' Stockton

as Dr. Morgan

as Mitch Mitchell

as Sergeant Grischa

as Jimmy Donlin

as John Joseph Madden

as Doyle

as Duke Mason

as Buzz Mitchell

as Blaine Davis

as Jim "Socker" Conway

as Eddie Lang

as Lt. Roger Craig

as Bud Williams

as 'Hardtack' Hamilton

as Self (uncredited)

as Himself (uncredited)

as Barry Cole

as Vic Toledo

as Johnnie Drew

as David Cook / Tom Cook

as Chris Martin

as Paul (uncredited)

as Jerry Casey

as Don Warren

as Walter Harmon

as Jim Holden / Dr. Gary Currier

as Brad Crowder

as Kenyon Scudder

as Paul Palmer

as Robert Holden

as Self

as Jerry Randolph

as Mike McGann

as Swanson

as Harry Kemp

as Warden