Federal Agents vs. Underworld, Inc.

Kirk Alyn

Inspector David Worth

Rosemary La Planche

Laura Keith

Roy Barcroft

Spade Gordon

Carol Forman

Nila

James Dale

Agent Steve Evans

Bruce Edwards

Prof. Paul Williams [Chs. 1-6]

James Craven

Prof. James Clayton [Chs. 1, 10-12]

Dave Anderson

Porter [Ch. 9]

The Red Glove

⭐ N/A

Mysterious Doctor Satan

⭐ 6.0

Elmo, the Mighty

⭐ 8.0

Elmo the Fearless

⭐ 8.0

The Fatal Ring

⭐ N/A