In London, a traitor is selling information. In Moscow, a Yorkshire cloth salesman is approached by the KGB, who believe he has more to sell than cloth.
| Actor | Role |
|---|---|
 Leonard RossiterNikolai Krobnevsky | Nikolai Krobnevsky |
 Brian BlessedReg Sugden | Reg Sugden |
 Bernard ArchardKenneth Ducane | Kenneth Ducane |
 Peter DyneleyCol. Golchenko | Col. Golchenko |
 Edward JuddGinger Ryan | Ginger Ryan |
 Maureen O'BrienNadia Seranova | Nadia Seranova |
 Hildegard NeilMarion | Marion |
 Harold InnocentTom Mayhew | Tom Mayhew |
 Timothy CarltonRoger List | Roger List |
| EEdwin FinnMike Parsons | Mike Parsons |