Secret Agent X-9

Larry J. Blake

Chief FBI Agent Wheeler (as Larry Blake)

Henry Hunter

FBI Agent Tommy Dawson (C-5)

George Shelley

Henchman Packard

Si Jenks

'Jolly Roger' Ticket Barker [Chs. 1, 4, 7-9]

Lynn Gilbert

Rosel [Chs. 2, 6-7, 12]