David Tennant has been having a stellar season on d'telly of late, and from what we've heard so far, his next performance will be just as enthralling. New BBC Drama The Politician's Wife sees Tennant team up with the wonderful Emily Watson to play political golden couple Aiden and Freya Horne. When a leadership challenge sees Aiden forced to resign from cabinet, a reshuffle puts his wife firmly in a seat of power. Can their marriage survive Aiden's fall to political obscurity?