The Oblong Murders (S14E04)

When Bullard seeks Barnaby's help in locating his friend's missing daughter, a member of the mysterious Oblong Foundation at Malham Hall, the investigation takes a dark turn. Jones goes undercover as a potential recruit, but as they delve deeper, they uncover connections to a long-unsolved case regarding a couple who perished in a boating explosion. The threads of the past may hold the key to finding the missing woman. Featuring Will Knightley, Kevin Doyle, Holly Aird, Barbara Flynn, and John Woodvine.