I started watching Ludwig on the iPlayer. It's an interesting premise, obviously written with David Mitchell in mind. Anyway, David Mitchell plays John "Ludwig" Turner. A reclusive crossword setter who gets a phone call from his sister-in-law, Lucy (Anna Maxwell Martin), and is summoned to Cambridge where it turns out his identical twin brother James, a police detective, has gone missing. John impersonates James to try and infiltrate the police station and get hold of a notebook to see whether they can find out where he is, and ends up having to investigate several cases. One of the reviews describes Mitchell as playing Mark from Peep Show in a detective show. It has some funny moments. There's some awkward romantic tension between Lucy and John, and the soundtrack is made up of the works of Beethoven, and some interesting synth type pieces which take inspiration from Beethoven. It's not bad. One of those Shakespeare and Hathaway type shows where you just stick it on for the hour and enjoy the ride. Also, Ralph Ineson is in it, and he's ace.