The Impossible Astronaut was the first episode of the sixth series of . It brought into perspective a fiendish plot to kill the Doctor and its ultimate outcome, leading his companions to believe he was going to die in the far future. This story is perhaps most notable as the first opening two-parter of the BBC Wales series. Behind the scenes, it was notable for the significant amount of location filming with cast and crew travelling to Utah in the United States of America.
Narratively, it saw the reappearance of River Song with some insight into her back story. Yet again, questions of her trustworthiness were posed. Additionally, it built on the references of the
Series 6, part 1 DVD cover
Released as Series 6 Part 1 with, , , , and on 11 July 2011.
The episode was later released in the complete series 6, which included the first and second half of the series, was released on DVD and Blu Ray on 21 November 2011.