Lets Kill Hitler is all about River Song. From starting as Melody to being shot by Hitler, regenerating in to the woman we all love; River Song. After poisoning the Doctor with a kiss and jumping out of the window in 1930's Berlin, she walks up to a few Nazi officers and gives a cracker of a speech when asked by one of the officers what she was doing there: "Well, I was on my way to this gay Gypsy bar mitzvah for the disabled, when I suddenly thought 'Gosh, the Third Reich's a bit rubbish, I think I'll kill the Fuhrer'. Who's with me?" This obviously leads to the Nazi squad shooting her over and over. However, she has just regenerated - silly Nazis! River expels the remainder of her regeneration energy out in a burst at them. Knocking them all down on the ground laughing she gets on a motorbike and goes, where else, shopping.