Arthur Stuart Hull

Character: Jack Morrell

Douglas MacLean

Character: Dudley Ainsworth

Patsy Ruth Miller

Character: Margarita

Stanhope Wheatcroft

Character: Leopoldo

Eulalie Jensen

Character: Donna Theresa

Lee Shumway

Character: Purser of S.S. President (as L.C. Shumway)

Fred Kelsey

Character: Agent John J. Doyle

George Periolat

Character: Don Rafael Desschado

Eric Mayne

Character: Admiral Rutledge

Bert Hadley

Character: Servant