Scott Kolk
Agent Dexter (X-9)
Lon Chaney Jr.
Maroni
Henry Brandon
Blackstone
Jean Rogers
Shara Graustark
Larry J. Blake
Chief FBI Agent Wheeler (as Larry Blake)
Si Jenks
'Jolly Roger' Ticket Barker [Chs. 1, 4, 7-9]
Monte Blue
Baron Michael Karsten
Henry Hunter
FBI Agent Tommy Dawson (C-5)
David Oliver
Pidge
Lynn Gilbert
Rosel [Chs. 2, 6-7, 12]