'Tinker Tailor Soldier Spy'

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It was a popular book and a British mini-series, but turning "Tinker Tailor Soldier Spy" into a movie took a very long time.

Although the book about Cold War espionage was written in the early '70s and the TV mini-series was in the late '70s, no one could seem to "squeeze" the whole story into a movie -- until now.

Stars Gary Oldman and Colin Firth talk about the film.