John Taylor lives in quiet solitude, designing puzzles for a living, under the nom-de-plume of 'Ludwig'. When his identical twin, James, disappears off the face of the earth, John takes over his brother's identity in a quest to discover his whereabouts.
Starring David Mitchell, Anna Maxwell Martin, Dipo Ola, Dorothy Atkinson, Dylan Hughes, Ralph Ineson, Izuka Hoyle, Gerran Howell, Ben Ashenden, Rumi Sutton