Ludwig (2024-) 
While seeking to unravel the mystery of his twin brother's disappearance, reclusive puzzle-designer John 'Ludwig' Taylor takes on his twin brother James's identity as DCI on Cambridge's major crimes squad.
Ludwig: Episode #1.2 Season 1, Episode 2
A man disappears, leaving his wife a cryptic message right before he does so. But it's not DCI James Taylor this time. [more inside]
Ludwig: Episode #1.1 Season 1, Episode 1
Puzzle setter John 'Ludwig' Taylor (David Mitchell)'s life is upended when his identical twin, DCI James Taylor, disappears. John reluctantly assumes his identity in order to track him down.