Midsomer Murders (1997)

S12E02 The Black Book

The discovery of an unrecognized artwork by an 18th-century artist prompts Barnaby to delve into a complex case involving a series of murders intertwined with art forgery. As he uncovers the truth behind the painting's origins, he encounters a web of deception that challenges his investigative skills and uncovers dark secrets hidden within the art world.