: Adapts A Darker Domain . Now promoted to Detective Inspector, Karen investigates a 1984 cold case involving the kidnapping of a wealthy heiress and her young son.

Whether you are a fan of the novels or a newcomer to the TV series, here is everything you need to know about , the refreshingly "unfashionable" and sharp-tongued Scottish detective. The TV Series (ITV/BritBox)

: Adapts The Distant Echo . Karen reopens a 25-year-old murder case of a barmaid after it becomes the focus of a viral true-crime podcast.