<P> Percy Alleline becomes the new Chief, Bill Haydon his deputy, and Roy Bland and Toby Esterhase his lieutenants . Despite Control and Smiley's misgivings, their successors have already begun a secret operation--"Witchcraft"--to obtain highly sensitive information from the Soviet Union, which is in turn being traded with the CIA for American intelligence . Smiley is brought out of retirement by Cabinet Office civil servant Oliver Lacon to investigate a claim by Ricki Tarr, a British spy, that for years there has been a mole in a senior role in the Circus, as Control had suspected . Smiley chooses a trustworthy agent, Peter Guillam, and retired Special Branch officer Mendel to help him . He interviews former Circus analyst Connie Sachs, who was sacked by Alleline after she deduced that Alexei Polyakov, a Soviet cultural attaché in London, was a spy . </P> <P> Tarr tells Smiley that on a mission to Istanbul, he had an affair with Irina, a Soviet agent . She wanted to reveal the name of a mole in the top ranks of the Circus but when Tarr reported this to London, they ignored him and ordered him straight home, while the Soviets promptly kidnapped Irina . Concluding that the mole had intercepted his message, Tarr went into hiding, suspected of defecting and murdering the British station chief . Smiley sends Guillam to steal the Circus logbook for the night Tarr had called and he finds the pages for that night have been cut out, supporting Tarr's story . Smiley interviews Prideaux, who reveals that after brutal interrogation, he was exchanged by the Soviets but sacked from the service . Prideaux says the purpose of the mission to Hungary was to get the name of the mole . Control had codenamed the suspects "Tinker" (Alleline), "Tailor" (Haydon), "Soldier" (Bland), "Poorman" (Esterhase) and "Beggarman" (Smiley). </P> <P> Smiley learns that Alleline, Haydon, Bland and Esterhase have been meeting Polyakov--the "Witchcraft" source--at a safe house somewhere in London, where Polyakov gives them supposedly high - grade Soviet intelligence, in exchange for low - grade British material to help him maintain his cover with the Soviets . However, the mole is passing substantive material, including US intelligence, to Polyakov, his handler, whilst Polyakov's material has just enough substance to persuade the CIA to share information with the British . Smiley blackmails the location of the safe house out of Esterhase, whose exile status makes him vulnerable to deportation . Smiley then has Tarr appear at the Paris office, implying he knows who the mole is . The mole is revealed to be Haydon when he meets Polyakov at the safe house, where Smiley captures him . The Circus plans to exchange Haydon with the Soviets but he is killed by Prideaux . Smiley returns to the Circus as its new chief . </P> <Ul> <Li> Gary Oldman as George Smiley ("Beggarman") </Li> <Li> Colin Firth as Bill Haydon ("Tailor") </Li> <Li> Tom Hardy as Ricki Tarr </Li> <Li> Mark Strong as Jim Prideaux </Li> <Li> Ciarán Hinds as Roy Bland ("Soldier") </Li> <Li> Benedict Cumberbatch as Peter Guillam </Li> <Li> David Dencik as Toby Esterhase ("Poorman") </Li> <Li> Stephen Graham as Jerry Westerby </Li> <Li> Simon McBurney as Oliver Lacon </Li> <Li> Toby Jones as Percy Alleline ("Tinker") </Li> <Li> John Hurt as Control </Li> <Li> Kathy Burke as Connie Sachs </Li> <Li> Roger Lloyd - Pack as Mendel </Li> <Li> Svetlana Khodchenkova as Irina </Li> <Li> Arthur Nightingale as Bryant </Li> <Li> John le Carré as Christmas party guest </Li> <Li> Christian McKay as Mackelvore </Li> <Li> Konstantin Khabensky as Polyakov </Li> <Li> Linda Marlowe as Mrs McCraig </Li> <Li> Michael Sarne as Karla </Li> <Li> Tomasz Kowalski as Boris </Li> <Li> Stuart Graham as Minister </Li> <Li> Zoltán Mucsi as Hungarian agent </Li> <Li> Laura Carmichael as Sal </Li> </Ul>

Who was the double agent in tinker tailor soldier spy