I'll take 2/4, but what an episode!
Beautiful mirror in the Spoiler: In the Red Wedding, Robb is Shot with arrows, stabbed and his mother has her throat cut. The three principle architects are Tywin Lannister, Roose Bolton and Walder Frey who are, in order, shot with arrows, stabbed and have their throat cut. It could only have been better if Arya had been using Black Walder's face, as then each man would have been killed by their son, but I'll take Frey Pie.