David Mitchell stars as an introverted writer of puzzle books who pretends to be his identical twin brother, a police officer, to help solve crimes.
John ‘Ludwig’ Taylor (David Mitchell), Lucy (Anna Maxwell Martin) and Henry Betts-Taylor (Dylan Hughes) (Image: BBC/Big Talk Studios/lly Courtney)
Filming took place in Rickmansworth last year, with High Street and The Drive used in August, September and November.
There were also unconfirmed reports of filming in Radlett and Chorleywood around the same time.
Other series that filmed in the district in 2025 included Babies, California Avenue, Trigger Point, and Tommy and Tuppence.
David Mitchell in Ludwig. (Image: BBC / Big Talk Studios / Olly Courtney)
The show’s second series will premier on BBC Two next month, with an exact date unconfirmed. It has already been renewed for a third series.
Series two will see Mark Bonnar and Sian Clifford join the cast, with the plot set to see Mitchell’s character work to solve “impossible” crimes for the Cambridge Police Authority.
Three Rivers District Council received a total of around £4,230 from filming fees paid in 2025.