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]

Joe Yrigoyen

Tristram Coffin

Tom Steele

Dale Van Sickel

Jack O'Shea

Marshall Reed

Robert J. Wilke

Robert St. Angelo

James Carlisle

John Daheim

Art Dillard

George Douglas

Sol Gorss

Bert LeBaron

Carey Loftin

Post Park

Loren Riebe

David Sharpe

Duke Taylor

Ken Terrell

Bud Wolfe

Fred C. Brannon

Royal K. Cole

Sol Shor

William Lively

Basil Dickey