Saturday Night Live never fails to astound me. It's been on TV for over 28 years now and it's still shocking sensibilities.
The week with Christopher Walken was inspired. From the Colonel Angus sketch to the life raft election sketch, Walken really shone and the writing was particularly entertaining—the Pranksters sketch was a little juvenile but still funny.
I think the most envelope-pushing sketch that I saw was Jingleheimer Junction.