A former British Secret Service agent is persuaded to negotiate a spy exchange with Russia, only to find himself drawn into political intrigues.
| Actor | Role |
|---|---|
 Robert HortonJohn Smith | John Smith |
 Sebastian CabotMax | Max |
 Jill St. JohnMary Harper | Mary Harper |
 Dudley FosterLeo | Leo |
| CClive GrahamJohns | Johns |
 George RoubicekKarkov | Karkov |
 Eric PohlmannBorensko | Borensko |
| EEric LongworthBoreman | Boreman |
 Eleanor SummerfieldMrs. Roberts | Mrs. Roberts |
 Timothy BatesonNot listed | Not listed |
| BBlake ButlerNot listed | Not listed |
 Warren StanhopeNot listed | Not listed |
 Martin WyldeckNot listed | Not listed |
 Carol ClevelandGirl | Girl |
| CCarol DilworthNot listed | Not listed |
| AAnna GilchristNot listed | Not listed |
 Constantine GregoryNot listed | Not listed |
 Drewe HenleyBarker | Barker |
 Michael SegalNot listed | Not listed |
| AAnthony StambouliehNot listed | Not listed |
| AAlex MillerFolk Singer | Folk Singer |