Dr. Mabuse The Gambler, Part Two: Inferno
As if it wasn't bad enough that the Doc's down wit O.P.P. now he's gone and put his heart in the part that spreads apart, so we already know Mabuse's goose's cooked. Sure, his body count triples, but his kill count stays at one, with the other two merely suicides. Worse, two of his three dead are from his own crew! In fact, despite the jump in bodies, this whole episode is totally devoid of any cash flow, looking more like “Dr. Mabuse, The Loser”.
But Doc M does bust a single move that earns him a Gangster honorable mention: when he hears the army is coming, watch how fast he drops his bogus hocus-pocus and righteously returns to serious Gangster Business.