"AN AMAZING ANSWER TO THE ATOMIC BOMB!"
A criminal mastermind known as The Crimson Ghost is out to steal a device called the Cyclotrode, which can short-circuit all electrical current on the planet.
Duncan Richards

Diana Farnsworth

Louis Ashe

Dr. Blackton [Ch. 11]

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

Prof. Van Wyck

Anderson [Chs. 1-4]

Maxwell

Prof. Parker (as Joe Forte)

Count Fator [Chs. 11-12]

Wilson [Ch. 1]

Henchman Stricker [Chs. 4, 7, 9]

Henchman Harte [Chs. 6-7]

Bain

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

Cross - Apartment Thug [Chs. 11-12]