Ludwig, BBC's comedy-detective drama starring David Mitchell, has been an undeniable smash for the channel since it debuted in 2024, raking in millions of views and praise from critics.Mitchell plays reclusive John Taylor, a puzzle book creator who uses the pseudonym "Ludwig", and finds himself drawn into the mysterious disappearance of his identical twin brother, Cambridge Police DCI James, with John using his deciphering skills to solve a series of puzzles left behind by James.