Charles Quigley

饰：Duncan Richards

琳达·斯特灵

Linda Stirling

饰：Diana Farnsworth

克雷顿·摩尔

Clayton Moore

饰：Ashe

I·斯坦福·乔利

I. Stanford Jolley

饰：Dr. Blackton [Ch. 11]

肯内·邓肯

Kenne Duncan

饰：Prof. Chambers [Chs. 1-2, 8]

Forrest Taylor

饰：Prof. Van Wyck

Emmett Vogan

饰：Anderson [Chs. 1-4]

萨姆·弗林特

Sam Flint

饰：Maxwell

Joseph Forte

饰：Prof. Parker

Stanley Price

饰：Count Fator [Chs. 11-12]

惠顿·钱伯斯

Wheaton Chambers

饰：Wilson [Ch. 1]

汤姆·斯蒂尔

Tom Steele

饰：Henchman [Chs. 4, 7, 9]

Dale Van Sickel

饰：Henchman Harte [Chs. 6-7]

雷克斯·利斯

Rex Lease

饰：Bain

弗莱德·格兰姆

Fred Graham

饰：Snyder [Chs. 1-2],Zane [Ch. 8]

Bud Wolfe

饰：Apartment thug [Chs. 11-12]

Rod Bacon

饰：Armored car guard [Ch. 3] (uncredited)

Virginia Carroll

饰：Nurse [Chs. 8-9] (uncredited)

约翰·达海姆

John Daheim

饰：Police driver [Ch. 3],Relief Guard [Ch. 9] (uncredited)

凯里·洛夫廷

Carey Loftin

饰：Lab guard #1 [Ch. 9] (uncredited)

乔治·麦格瑞

George Magrill

饰：Henchman Fiske [Ch. 3] (uncredited)

Eddie Parker

饰：Henchman Sherman [Chs. 1, 8] (uncredited)

Rose Plumer

饰：Mrs. Malloy [Ch. 11] (uncredited)

Loren Riebe

饰：Truck henchman [Ch. 6] (uncredited)

Eddie Rocco

Eddie Rocco

饰：Kell (uncredited)

Dick Rush

饰：Police Inspector [Ch. 12] (uncredited)

Duke Taylor

饰：Lab henchman [Chs. 7-8] (uncredited)

肯·特雷尔

Ken Terrell

饰：Warehouse thug [Chs.10-11] (uncredited)

罗伯特·J·威尔克

Robert J. Wilke

饰：Scott, armored car driver [Ch. 3] (uncredited)

Bill Wilkus

Bill Wilkus

饰：Cole, the pilot [Chs. 5-6] (uncredited)

Bill Yrigoyen

饰：Lab Henchman [Ch. 2] (uncredited)

Joe Yrigoyen

饰：Janitor-thug [Ch. 1] (uncredited)