Charles K. Gerrard

Dr. Amersham

Mr. Whitman

Bailiff

Martin

Gibson

Bert

Lord Leopold Ambrose Plumtree (uncredited)

Walter Harvey

Mason

Cmdr. Weymouth

London Tower

Henry Lord (as Charles Gerrard)

Count Polinac

Leonard Hardingham

Crook

DeLeon

Robert Van Dorn

Raymond Tyson (as Charles Gerrard)

Scott's son

Arthur Remsen

Count Lazlos

Steve

Dr. Carl Tanzer

Major Russett

Reggie De Vere

Lait Rodman

Paul Glynn

Count Karaloff

Creighton Deane

Ballard 'Bal' Barrett

Ted Conroy

Tom Hayden

Clarence Topping

Sir Peter Dare

Saladin

'Streffy' (Lord Altringham)

Jim Slade (as Charles Gerard)

Sir Adam Judson

Dipley Poole

Martin Tancray

Keith Merwyn (as Charles Gerard)

French Pete

John Stewart

Ned Ormsby

Qualters (as Charles Gerard)

Duval

Don Alvarez

Baron de Ville

William Gurson, aka 'Will the Weasel'

Vincent Cortez

Gordon Savage

Van Surdam

Theo Kameneff

John Harland

Thompson

Hugh Varick

Gerald Grant

Wingate

Karl Wagner

Gordon Trenwith

Tom Reardon

Grand Duke Orlof

Capt. Francis Barold

Samuel Winter

Charles Riddles - Ethel's Lover

Lawrence Topham (as Charles Gerard)

Lord Percy Brentwood

Count Renier