A federal agent joins forces with a British lawman to foil a spy ring.
| Actor | Role |
|---|---|
 Howard St. JohnDavid Harding | David Harding |
 Amanda BlakeKaren Michelle | Karen Michelle |
 Ron RandellSimon Langdon | Simon Langdon |
 June VincentBarbara Taylor | Barbara Taylor |
 Fred F. SearsPeters | Peters |
 John DehnerBob Reynolds | Bob Reynolds |
 Lewis MartinHugo Borne | Hugo Borne |
 John DoucetteLarry | Larry |