| Amidst the thaw of glasnost, the Kremlin discovers that two Soviet agents, sent to England under deep cover in 1965, have been "lost." A beautiful and ambitious Russian agent, sent to London to track them down, becomes embroiled in a tangle of CIA, KGB and MI-5 plots and counter-plots as the two lost agents, now utterly assimilated, try to avoid detection. |
| Name | Character | Episodes |
|---|---|---|
| David Calder | Viktor Chekhov | 4 |
| Warren Clarke | Albert Robinson | 4 |
| Richard Huw | 4 | |
| Nigel Havers | Jeremy Coward | 4 |
| Michael Gough | Andrei Zorin | 4 |
| Christopher Rozycki | Oleg Petrovski | 4 |
| Annie Hulley | 4 |