the Doctor finally kills Hitler???

After the spectacular mid season finale Doctor Who Continued with a blast!!!!!

Firstly we learn that responsible for crop circle calling Doctor are Amy and Rory.And then we have the debut of Mel, the long life friend of Amy and Rory's wanting to see the Doctor after stealing a expensive Corvette! with the threat of a gun(?) they travel to Berlin of late 30s.But there is another group of time travelers called Justice Department who imprisons and exterminate famous criminals through history in their vessel called Teselecta which is a humanoid robot.As they are falsely ready to kill Hitler ,the Tardis invades from the window and messes the hole operation.But Mels is mortally wounded and begins to glow as a time lord and then they realise that Amy named her daughter after her daughter.When she completes the regeneration she is a psychopath fun lovin killer River Song who tries to kill Doctor and successfully poisons him with a kiss.Then leaves to go shopping by invading a German restaurant taking all the clothes!!!But how Doctor survives and what happens to River Song???????