Smiley, now fortified with new information, goes to confront Jim Prideaux, an old spy who long since came in from the cold and is now a school teacher. Control, in his last days, seemed to have confided in him and sent him on a mission behind the Iron Curtain to find out who exactly the mole in the Circus was, Tinker, Tailor, Soldier, Rich man, or Poor man.
| Name | Type | Role | |
|---|---|---|---|
| Arthur Hopcraft | Writer | ||
| Mandy Cuthbert | Guest Star | ||
| Duncan Jones | Guest Star | ||
| Ian Bannen | Guest Star | ||
| Daniel Beecher | Guest Star | ||
| John Standing | Guest Star | ||
| Alexander Knox | Guest Star | ||
| John Irvin | Director | ||
| John le Carré | Director |