Down Among the Dead Men (S09E04)

In "Down Among the Dead Men," Barnaby and Jones delve into the murder of Martin Barrett, a notorious blackmailer with a long list of victims, complicating their search for the killer. As they sift through potential suspects, another of Barrett’s victims, Sir John Waverley, receives a fresh threat. The investigation takes a turn towards the coast, where the detectives explore an uncharted shipwreck in pursuit of hidden treasures linked to the case, uncovering secrets that may lead to the truth behind Barrett's demise.