Calificación
Reparto

Charles Quigley
Duncan Richards

Linda Stirling
Diana Farnsworth

Clayton Moore
Louis Ashe

I. Stanford Jolley
Dr. Blackton [Ch. 11]

Kenne Duncan
Dr. Chambers [Chs. 1-2, 8]

Forrest Taylor
Prof. Van Wyck

Emmett Vogan
Anderson [Chs. 1-4]

Sam Flint
Maxwell

Joseph Forte
Prof. Parker (as Joe Forte)

Stanley Price
Count Fator [Chs. 11-12]

Wheaton Chambers
Wilson [Ch. 1]

Tom Steele
Henchman Stricker [Chs. 4, 7, 9]

Dale Van Sickel
Henchman Harte [Chs. 6-7]

Rex Lease
Bain

Fred Graham
Snyder [Chs. 1-2] / Zane [Ch. 8]

Bud Wolfe
Cross - Apartment Thug [Chs. 11-12]