Vicky's ex-husband, John, invites her on a trip to communist Prague. First John disappears, then her passport. Vicky finds herself alone and penniless in Prague and becomes a tragic pawn caught in a web of espionage and murder.
| Actor | Role |
|---|---|
 Susan GeorgeVicky Duncan | Vicky Duncan |
 Patrick MowerJohn Patrick Duncan | John Patrick Duncan |
 Richard HefferRoger Brown | Roger Brown |
 Peter VaughanBullneck | Bullneck |
 Stefan GryffInspector | Inspector |
 Sandor Elès2nd Desk Clerk | 2nd Desk Clerk |
 Catherine NeilsonMarie Vladekova | Marie Vladekova |
 George MikellPlain Clothes Policeman | Plain Clothes Policeman |
| HHana Maria PravdaMrs. Pircek | Mrs. Pircek |
 Jiří StanislavIvan Jiracek | Ivan Jiracek |
 Pam St. ClementDoctor | Doctor |