David Tennant's latest role has been a little, well, freaky, but still rather compelling all the same. Aiden's fending off a sex scandal in the series finale, hoping that it won't ruin his chances of making a big political comeback. Meanwhile, he discovers that the missus has been telling a few porky pies. He decides it's high time to put everything on the line, plotting the demise of his wife and her new best friend, alongside his return to political glory. But is it all too much for one man to handle?