The waiting has paid off and the traps closes on Karla's mole. It is agreed to trade him against several English spies who were captured by the KGB, but Prideaux is still not found and he has an open account to settle with the mole. With the command structure of the Circus hollowed out and containment in progress, Smiley cannot come in from the cold but remains to pick up the pieces.
| Name | Type | Role | |
|---|---|---|---|
| Arthur Hopcraft | Writer | ||
| Siân Phillips | Guest Star | ||
| Ian Bannen | Guest Star | ||
| Alec Sabin | Guest Star | ||
| George Pravda | Guest Star | ||
| Duncan Jones | Guest Star | ||
| Daniel Beecher | Guest Star | ||
| John le Carré | Director | ||
| John Irvin | Director |