I was mystified by the title sequence to this film – slomo images of ballet dancer Carlos Acosta. Then a Russian family get murdered in the snowy forests. It wrong-footed me as I suspect it was meant to do. Because this is really a very long howl of protest by the great John Le Carre about the horrendous nature of corruption at the heart of the British establishment and the City of London, that sacred cow of Labourite and Tory alike, whose exponential development has led to the nicest residential areas turned into bulletproofed enclaves for Russian mobsters. Perry (Ewan McGregor) is a lecturer in poetics, in Morocco with his lawyer wife Gail (Naomie Harris) on a holiday we realise is intended to repair their marriage following his relationship with a student. He meets loud and noisy Dima (Stellan Skarsgard) at a party, becomes embroiled with his family and secretly agrees to bring a memory stick to London for the attention of MI6 who send Hector (Damian Lewis) to examine its contents. Dima launders money for the Russian Mafia. Hector’s aim to get Dima and his family away from the Mafia’s clutches in exchange for information is quickly disavowed when it becomes apparent he doesn’t yet have enough to get ‘the Prince’, head of the Russians, who wants to go legit with the help of a politician (Jeremy Northam) by laundering money properly through setting up a bank in the City. So Perry and his wife are asked to help a rogue mission for MI6. Danger, Will Robinson … This is a very specific kind of spy thriller and one that quietly sneaks into your brain, rather like a political worm unsettling your conscience, as Dima contaminates Perry’s. Hossein Amini’s adaptation does a fair job structuring what is hardly a classic spy tale but its morality lingers, as does the realisation that Dima’s ultimate situation has been triggered by the classic act of familial entrapment, witnessed, funnily enough, by Gail. Susanna White had the pleasure of directing Le Carre as a doorman to the Einstein Museum in a production of which he had an Executive role: those famous images of the scientist sticking his tongue out replay when it hits you what a confidence trick this film has pulled off. It makes you THINK.