Hit ’40s-set detective drama with Jason Watkins gets first look at season 2 and new cast

The period drama, led by Mark Gatiss and finished filming in December 2025, has offered a sneak peek at the next season. This includes a first look at Jason Watkins as Harold Sneed, a new character joining the cast.

Alongside Polly Walker (known for Bridgerton) as Trottie Book and Connor Finch as Jack Blunt, Gatiss plays Gabriel Book, a bookshop owner who finds himself solving crimes in London during 1946.