DI Jack Regan (John Thaw – Inspector Morse) is the total professional, a 24-hours-a-day cop whose commitment to his job has already led to the break-up of his marriage. Regan’s partner, DS George Carter (Dennis Waterman – Minder), is a sharp, South London Cockney. Together, Regan and Carter lead a unit of skilled detectives who infiltrate and bust up London’s criminal underworld.