Jack Holt
Jack Holt / Nick Farrell
Acting
Evelyn Brent
Kay Drew
Acting
John Ward
'Lucky' Arnold
Acting
Ted Adams
Quist
Acting
Joe McGuinn
'Crimp' Evans [Chs. 1, 4-15]
Acting
Tris Coffin
Ed Valdin [Chs. 1-10]
Acting
Stanley Blystone
Garrity [Chs. 11-15]
Acting
George Chesebro
Rankin [Chs. 11-15]
Acting
Stanley Price
Dent [Chs. 11-15]
Acting
C. Montague Shaw
Chief John W. Malloy (as Montague Shaw)
Acting
Edward Hearn
Agent Jim Layton
Acting
Jack Cheatham
Agent Frank [Chs. 3-5, 8-9, 15]
Acting
Ray Parsons
John Severn - Engraver [Chs. 1-4]
Acting