伊沃琳·奈普

Evalyn Knapp

饰：Pauline Hargrave

Craig Reynolds

饰：Robert Ward

James Durkin

饰：Professor Hargrave

约翰·戴维森

John Davidson

饰：Dr. Bashan

Sonny Ray

饰：Willie Dodge

Frank Lackteen

饰：Fang

帕特·奥马利

Pat O'Malley

饰：Tim Sullivan, Aviator [Chs. 5-7]

William Desmond

饰：Professor Thompson [Chs. 9-12]

Josef Swickard

饰：Haggins, Foreign Consul - Ch. 9

威廉·沃辛顿

William Worthington

饰：American Consul [Ch. 1]

Adolph Milar

饰：Captain Drake [Chs. 2-3]

Beulah Hutton

Merrill McCormick

蒙特·蒙塔古

Monte Montague

Philip Sleeman

Al Kikume

伊桑·莱德劳

Ethan Laidlaw

乔治德诺尔芒迪

George DeNormand

汤姆·朗顿

Tom London

查尔斯·史蒂文斯

Charles Stevens