Giancarlo Esposito -- aka Gustavo "Gus" Fring on "Breaking Bad" -- was a revelation in the acclaimed show's fourth season. Fring is outwardly a meticulous owner of a chain of fried chicken restaurants, but he's secretly the ruthless kingpin of a dangerous drug cartel. Esposito played Fring with a chilling calmness, which made his methodical, violent eruptions all the more unnerving. And his last scene this season? Absolutely shocking.