Into episode 2 and I'm thoroughly enjoying this thriller/drama. It's got spies, S & M, illicit homosexual love and plenty more. Starring Ben Whishaw (Yes, he gets naked. Doesn't he always) and the most underrated British actor of his generation, Jim Broadbent it's a very British styled series.

As a Londoner I always get enjoyment from trying to work out where shows set in London are filmed.