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 / Agent Wright
SAC Bryan Durant / Alvin Forest
Hair and Fibers Expert / Technician
Howard Deal / Paul Leonard
Glenn Orland / Special Agent Henry Andover
Clenard Massey / Duke Bergan
Ed Ramser / Workman
Rudy Waldon / Johnny Sutton
SAC Allen Clark / SAC James Day
Victor Quinlan / Customs Inspector
George Hale / Israel Jacobs
Ronnie Brimlow / Jim Wade
SAC Gary Morgan / Chicago Special Agent
Howard Rademaker / Frank Welles
Gary Grove / Dick Amazeen
Higgins / Dan Wheaton
Sam Langlin / Ty Williams
