Revenge of the Sith
Wow! What an experience! The misdirection as to the identity of the Evil Sith Lord in episodes 1 and 2 was completely successful! I was flabbergasted to learn who the evil mastermind really was!
It echoes through my mind still, and always will:
"Meesa no name Jar-Jar Binks! Meesa name: DARTH SIDIOUS!!!!"