Special Agent Tom Colby / SAC Kendall Lisbon
Lewis Erskine
Arthur Ward
Narrator (uncredited)
Agente especial Chris Daniels
Agente especial Jim Rhodes
Barbara Erskine
SAC Chet Randolph / Kirby Greene
SAC Bryan Durant / Alvin Forest
Hair and Fibers Expert / Technician
Howard Deal / Orkin
Glenn Orland / Bernard Stoddard
Clenard Massey / Casey
Carl Pike / Workman
Maury Maddock / Johnny Sutton
R. A. Dale Cameron / Tully Carlson
Victor Quinlan / SRA Arnold Kaplan
Martin Eldon / Israel Jacobs
Logan Dupree / Ronnie Brimlow
SAC Gary Morgan / Clayton McGregor
Howard Rademaker / John Elgin
Arly Carter / Eugene Moody
Clifford Banning / Dr. Latimer
Ty Williams / Sam Langlin
