The Butcher's Boy - S4.E22

Racketeer Gus Ducek is fingered to be knocked off. But when the car with the hitmen drives towards him, Ducek's boys fire back with machine guns, turning the tables; one hitman dies, Boley Davis escapes. Watching the botched rubout attempt are Lt. Philip Hedden and Sgt. Davey McCain. Eliot Ness and his men are out to pin the murder attempt on Hedden, since the hitmen were driving one of his cars.