"The Sounds of Silencers" is an episode of The Itchy & Scratchy Show.
Police officer Itchy is reviewing a lineup of cat suspects who are standing up against a wall. Itchy holds his billy club while he thinks, thumping it into the palm of his hand. Then he tosses the club aside, draws a tommygun, and starts blasting away at the lineup, riddling all of the suspects with bullets. The suspects all fall down dead. Itchy fires at the wall again, spelling out "THE END" with bullet holes. As Itchy makes the "D", one last cat suspect comes in and is hit with the bullets for the "D". The last suspect collapses and dies, revealing "THE END" written on the wall in bullet holes with a blood-smeared "D".