The Expert is a British television series produced by the BBC between 1968 and 1976.The series starred Marius Goring as Dr. John Hardy, a pathologist working for the Home Office and was essentially a police procedural drama, with Hardy bringing his forensic knowledge to solve various cases.The Expert was created and produced by Gerard Glaister. The series was also one of the first BBC dramas to be made in colour, and throughout its four series had numerous high quality guest appearances by actors such as John Carson, Peter Copley, Rachel Kempson, Peter Vaughan, Clive Swift, Geoffrey Palmer, Peter Barkworth, Jean Marsh, Ray Brooks, George Sewell, Anthony Valentine, Bernard Lee, Lee Montague, Geoffrey Bayldon, Mike Pratt, Edward Fox, André Morell, Brian Blessed, Nigel Stock, Philip Madoc and Warren Clarke.

While on death row for killing a policeman, small-time criminal Adam (Ian Jacklin) is sprung from his cell and asked to join a covert government organization that will shape him into a killing machine. He is trained by the group's ruthless leader Janson (Sam J. Jones), and is aided by the group's martial arts master Miller (Mel Novak)) and the group's weapons freak expert Magnet (Joe Estevez). Together they turn out Adam code named the 'Expert Weapon'. But when Adam decides to leave his life of crime, he learns that leaving the group is his real death sentence.

In the early future, the government created a secret intelligence agency using psychics. Team 5 leader Lee-hwa is dispatched to an undercover office, not the headquarters, and is monitoring the hostile forces alone. One day, a new psychic, Seung-tae, comes to her undercover office, and she starts working undercover with him. However, the new recruit was sent by the director to monitor Lee-hwa and report her every move.