Ben Whishaw, spy thriller, and then add in Keira Knightley, sold I'm in. Great opener; however, this was a bit of a miss to start. It's an intriguing mystery with romance elements at the center, so enjoyable enough to watch if you don't mind writing choices that have these spies and assassins making decisions that are just so not spy-like. Some other elements just make no sense for the characters but I stopped after episode 2, and maybe it gets better by the end.