Malcolm Waite

as Cocky

as Big Strength Machine Contestant (uncredited)

as Miner (uncredited)

as Captain of Guards

as Juryman

as Jamison - the smelter

as Fireman

as Murphy

as Higgins the Butler

as Ted Grant

as The Balkan Prisoner / Shem

as Sea Captain

as Dan Bell

as Bergerin

as Prof. Saenger

as Big Boyle

as Jeff Hoades

as Blanco Johnson

as Pete Krell

as Jack Shields

as Clem Allison

as Jack Cameron

as Denman

as Carter

as Donald Duffield - Harry's Rival

as Big-Boy

as (uncredited)