Calificación
Reparto

Kirk Alyn
Blackhawk

Carol Forman
Laska

Carol Forman
Chuck

John Crawford
Chuck

Michael Fox
Mr. Case

Don C. Harvey
Olaf

Rick Vallin
Stan / Boris

Larry Stewart
Andre

Weaver Levy
Chop Chop

Zon Murray
Bork

Nick Stuart
Cress

Marshall Reed
Aller

Pierce Lyden
Dyke

William Fawcett
Dr. Rolph [Chs. 4-7]

Rory Mallinson
Hodge [Chs. 11-14]

Frank Ellis
Hendrickson [Chs. 1-2, 4, 8-9]