Series 6 - Matt Smith

Unofficial third co-host and first-time Who watcher Char pops in again! This time, it's her initial watch of Series 6, the sophomore year of the Eleventh Doctor and his companions. From episode one, kicking off the story arc and setting up several mysteries, thru the revelation about River Song's identity, to ending with a "reset" of the Doctor's story - there's a lot to get thru. What was your favorite moment of this series?