New Tinker Tailor Soldier Spy Clip - Be suspicious; be very suspicious

We get a glimpse here of Control (John Hurt), the man at the top of the "Circus", Britain's foreign intelligence agency (or MI6 to you and me) in the early 1970s. He briefs agent Jim Prideaux (Mark Strong) in the hunt for the mole, assigning code-names to each of the suspects in the hunt. You'll also catch a glimpse here of Gary Oldman's George Smiley, who becomes the key figure in the hunt for the shadowy leak. This clip does contain mild spoilers for the film, if you haven't read the book or come across the seminal 1979 TV series, so tread carefully.