No doubt remains, a mole has infiltrated the Circus, code name for the British Secret Intelligence Service. It can be only one of four men operating at the very highest level. Sidelined agent George Smiley is covertly tapped to root out the mole, a task that requires a painstaking dig through the double-blind world of Cold War era espionage and his own past.

It hasn't been revealed yet who will be playing the film's hero, George Smiley, who was the protagonist in a half-dozen Le Carre novels.

This is the second big splash Working Title has made today, the first being the news that they're preparing a live-action Little Mermaid movie.

Source: Variety