G-men vs. the Black Dragon

Rod Cameron

Rex Bennett

Roland Got

Chang Sing

Constance Worth

Vivian Marsh

Nino Pipitone

Oyama Haruchi

Noel Cravat

Ranga

George J. Lewis

Lugo

Maxine Doyle

Marie [Ch. 8]

Donald Kirke

Muller - Pier 17 Thug [Ch.1]

Ivan Miller

Pier 17 Customs Inspector [Ch.1]

Walter Fenner

Williams - Financial Agent [Ch.1]

C. Montague Shaw

Prof. Nicholson [Ch. 3-4]

Harry Burns

Tony Mills [Ch. 4, 12-13]

Forbes Murray

James Kennedy [Ch. 12]

Hooper Atchley

Harrison J. Caldwell [Ch. 5]

Robert Homans

Capt. Gorman [Ch. 12-13]

Allen Jung

Fuji - Escaped Japanese Spy [Ch.2]