Hardcastle and McCormick (1983) : 3x11

In an unusual coincidence, a judge's convention is scheduled at the same hotel as a major mob meeting. Unable to do anything about the mobsters (as they have not been caught breaking any laws), Hardcastle instead concentrates on his nomination for a lifetime achievement award. For some extra insurance, Hardcastle pulls strings and has himself put in what he considers to be a lucky room. Actually, Hardcastle ends up in a room originally assigned to a hitman. That night, believing the assassin is in the judge's room, someone leaves a suitcase containing a rifle and a picture of mobsters Don Ferris and Sid Storm. Before Hardcastle can show the police, he is ambushed and the suitcase is taken. Hardcastle, unable to provide the police with any evidence, decides to visit Ferris. Although the mobsters are initially unwilling to believe the judge, they change their mind after Sid is murdered. Establishing an uneasy alliance, Ferry and Hardcastle put together the clues and realize that the hitman is a man named Lee Orlando. Reviewing Orlando's' recent history, Hardcastle discovers that the hitman has a connection with "Bucky" O'Neil, his main rival for the judge's award. Analyzing Bucky's court records, Hardcastle uncovers evidence that his rival has been fixing trials for the mob. Meanwhile, Ferris learns that Hardcastle is the assassin's next target. Due in part to the unorthodox teaming of Mark and the mob, Orlando is stopped and Hardcastle captures Bucky. Afterwards, Hardcastle, who does not win the judge's award, finds himself the unlikely recipient of an award from Ferris and the mob.