G-men vs. the Black Dragon

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]