Dame, König, As, Spion
Alec GuinnessGeorge Smiley
Michael JaystonPeter Guillam
Anthony BateSir Oliver Lacon
George SewellMendel
Bernard HeptonToby Esterhase
Robert MacNeilSelf – Host (uncredited)
Ian RichardsonBill Haydon
Hywel BennettRicki Tarr
Michael AldridgePercy Alleline
Terence RigbyRoy Bland
Ian BannenJim Prideaux- AAlec SabinFawn
Beryl ReidConnie Sachs
Alexander KnoxControl- DDuncan JonesRoach
- DDaniel BeecherSpikely
- FFrank ComptonBryant
Frank MooreyLauder Strickland- JJohn WellsHeadmaster
- TTerry PearsonSchoolmaster (uncredited)
Nigel StockRoddy Martindale
Milos KirekBarak
Eugene LipinskiCzech Guard- BBrian HawksleyBookseller
Thorley WaltersTufty Thessinger- SSusan KodicekIrina
- HHilary MinsterBoris
- PPauline LettsMrs Pope-Graham
- SStephen EarleNorman
- TTimothy StetsonThe American
- JJean RimmerSenior Secretary
Patrick StewartKarla- MMarjorie HoganAlisa Brimley
- JJoe PramlPaul Skordeno
Warren ClarkeAlwyn
John StandingSam Collins- MMandy CuthbertMolly Purcell
Joss AcklandJerry Westerby
Guy StandevenFlemyng-Smith- BBetty HardyHeadmaster's Mother
- JJo AptedLinda
Siân PhillipsAnn Smiley
George PravdaPolyakov- RReg ThomasonReception (uncredited)
Michael FishSelf (archive footage)