Conrad Nagel

as John Robinson Gordon

Florence Rice

as Evelyn Vail

Raymond Walburn

as Evans

Geneva Mitchell

as Helen Gilbert

Robert Allen

as Baker

Oscar Apfel

as Wallace P. Burroughs

Miki Morita

as Satu

Purnell Pratt

as Dr. Landers

Irene Franklin

as Mrs. Laura Madison

George Irving

as Dr. Jim Moffat

Adrian Rosley

as Pastoli

Fred Kelsey

as Police Lieutenant O'Brien

George 'Gabby' Hayes

as Wotkyns

William B. Davidson

as Police Captain Barrie

Mark Strong

as Frank (uncredited)