There are predators that stalk the night, and there's a predator who stalks them. What would a forensic technician and serial killer to do with a fellow murderer taped up in his kill room?

Right, silly question.

Two homicidal ponies, but a party of four. The knives come out, Dexter spends some quality time with a kindred spirit, and Pinkie Pie finally receives her just desserts for Cupcakes.