Robert Horton

as Mr. Melville, Cattle Buyer

as Dr. Mitchell

as Jack (uncredited)

as Cousin Bertie

as John Smith

as Jackie Roach

as Tom Herrera

as Francis Aloysius Belney

as Russ Hartley

as Dr. Jim Harris

as Friendly Young Man on Ship (uncredited)

as Commander Jack Rankin

as Self

as Jack Hutchings

as Self - Presenter

as Flint McCullough

as Tad Spencer

as Frank Armitage

as Gil Larkin

as John Fenton

as Wallace Donaldson

as Mason Bridges

as Walter Richmond