BBC Doctor Who
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"The Impossible Astronaut" is the first episode of the sixth series of the British science fiction television series Doctor Who. It was first broadcast on 23 April 2011 in the United Kingdom, as well as the United States and Canada.
In the episode, Amy Pond, Rory and River Song are summoned to Utah, USA, by the Eleventh Doctor, who is killed by a mysterious figure in a space suit. The dead Doctor is revealed to be an older self, after his younger version returns. They try to understand what the future Doctor said and are sent to Washington D.C. The team deals with the Silence, a race of aliens with the ability to make people forget their encounter with them when they look away.