Mafia 46. Lord of the Rings.

And include Elephant as well.

And have Hostor and Elephant join the Mafia. And have Gill say: "Don't worry, city, I'll figure it all out." And have the city not panic and wait for Gill to figure it out. And have the Mafia write notes, but the real investigators don't. And have Gill say: "Execute username, he's Mafia, 100% sure." And have the city execute an innocent username. And have Hostor and Elephant reveal themselves as Mafia, and have everyone see it. And have Gill say: "It can't be, they're not Mafia, the Mafia is someone else." And have the city listen to Gill. And have Hostor keep revealing himself, and the city keeps listening.