Yes, the impossible astronaut in Doctor Who is revealed to be River Song, who is known for her connection to the Doctor and her mysterious past.
Yes. River Song is the Impossible Astronaut. She was programmed by the Silence to kill the Doctor even though she didn't want to.
Yes. In "Closing Time", it is shown that she is met by the eyepatch woman and two Silences. River Song is forced into a space suit, then submerged in Lake Silencio. She is seen thinking of the 'Tick Tock Goes The Clock' song at the end of the episode. In a previous episode, it shows her getting out and shooting the doctor. No one knows what they spoke of before she shoots him, however.
River Song first appeared in 2008, when David Tennant was still playing the Doctor. The first time we saw River Song was when she died. River and the Doctor are moving in opposite directions in time, so as we, the viewers, move forward with the Doctor, we are seeing River Song's past.
River Song is played by Alex Kingston.
There has been no proof or solid statement as to who the person River Song killed is, only speculation. I think that, considering River Song described him as the best man she ever knew, and told the Doctor that the identitly of the murderee was "spoilers", it's possible that she killed him in future regeneration. Someday, we may know for sure.
In Season 6, "Let's Kill Hitler", River tries to kill the Doctor with poisoned lipstick. Toward the end of the episode she heals him, sacrificing all her regenerations to do so. She goes off to study archaeology, to find clues to locating the doctor. During this episode, the guys from the future also identify River Song as a criminal, the woman who killed the Doctor. At the end of "Closing Time", River finishes her doctorate and Kovarian returns to tell her that some of the clues that she's been digging up about the Doctor - the date and place of his death, for example - are correct, and that she, River, is the "Impossible Astronaut" who will kill him. Kovarian has some of the Silents drug her, dress her in the astronaut suit and - as the episode ends - we see River submerged in Lake Silencio, waiting to kill him.
So the Doctor and River can catch up to eachother on what they have done.
river song
The astronaut who killed the doctor in Doctor Who is River Song. She is a character who has a complex relationship with the Doctor throughout the series.
No, Amy Pond is not the daughter of the Doctor and River Song. Amy Pond is a companion of the Doctor in the television series Doctor Who, and River Song is a character connected to the Doctor in a different way. Their relationship is more complex than just parent and child.
In the episode "Let's Kill Hitler" of Doctor Who, the Doctor whispers "Look into my eye" to River Song. This phrase is significant because it triggers a hidden post-hypnotic suggestion the Doctor had planted in River's mind earlier in her timeline. This suggestion ultimately saves the Doctor's life in that episode.