It features Eleven (Matt Smith) and companions Amy (Karen Gillan), Rory (Arthur Darvill) and River (Alex Kingston) as well as introducing Canton Everett Delaware III, son of Agent CIA who is in relation to the King of The Apes.
It's a two-parter concluding with Day of the Moon.
Amy, Rory and River are summoned to Utah by Eleven who is then killed by some cunt in a space suit. The dead Doctor is revealed to be an older version after his younger self returns. Then they're off to Washington D.C to do battle with Osama Bin Laden.