The episode features alien time traveller the Doctor (Matt Smith) and his companions Amy Pond (Karen Gillan) and Rory Williams (Arthur Darvill), and is the first of a two-part story, which concluded with "Day of the Moon" on 30 April.
Trying to understand the enigmatic hints about "Space 1969" the older Doctor mentioned and a man they meet in 2011 called Canton Everett Delaware III (Mark Sheppard in 1969 and William Morgan Sheppard in 2011), they travel to the United States in 1969 and discover a scared girl (Sydney Wade) who is trapped inside a spacesuit.
The episode was partially filmed on location at Lone Rock, Utah, the first time in Doctor Who that principal photography took place in the United States.
The episode was dedicated to Elisabeth Sladen, known for playing former companion Sarah Jane Smith, who died from cancer on 19 April 2011.
[2][3] During a break from their travels with the Eleventh Doctor, his companions Amy and Rory are sent envelopes summoning them to Utah at a specific time and location.
During the picnic, a figure emerges from the lake wearing an American astronaut suit and shoots the Doctor multiple times, causing him to collapse.
Amy, Rory, and River talk at a diner when they discover the fourth envelope was sent to the Doctor, alive and 200 years younger than the one at the lake.
After some thought, she smiles and says "Fish fingers and custard," referring to events in "The Eleventh Hour," when Amy first meets the Doctor as a little girl.
[6] "The Impossible Astronaut" / "Day of the Moon" was the first two-part episode to open a series since the 1985 Sixth Doctor story Attack of the Cybermen.
"[5] In writing the death scene of the older version of the Doctor, Moffat wanted to acknowledge to the audience that Time Lords are not invincible, and could still die permanently if killed before regeneration.
In creating the Silence, the alien antagonists of the episode, Moffat wanted them to challenge past monsters in terms of "scariness.
For the opening shot for the location, director Toby Haynes wanted it to be epic so that the audience could recognise where the episode was set.
The crew wanted to add as many American icons as they could into those shots, including a Stetson hat, a 1950s Edsel Villager, and a yellow school bus.
[5] At some point before the broadcast of the episode, it and "Day of the Moon" were released in a press screening, where a number of fans were invited to attend.
So to have some twit who came to a press launch, write up a story in the worst, most ham-fisted English you can imagine, and put it on the internet, I just hope that guy never watches my show again, because that's a horrific thing to do.Despite this he added that the majority of Doctor Who fans are "spoiler-phobes," who refused to go online to be spoiled.
[24] 1.3 million viewers saw "The Impossible Astronaut" on BBC America, making it the highest rated telecast in the history of the channel.
[20] Audience measurement service Kantar Media reported that "The Impossible Astronaut" is the most recorded television event of all time.
Analysis of BARB data revealed that 4.11 million people recorded and viewed the programme within a week of broadcast, accounting for 46% of the episode's total viewers.
Killing the Doctor leaves the shape of the series mapped out, raises the bar so that no one is safe, and sees Amy, Rory and River facing a terrible dilemma.
"[33] Commenting on the future-Doctor's death, Jeffery said "seven minutes in, a nation's collective jaw dropped as The Doctor — this show's lead — is mercilessly gunned down.
"[33] Jeffery also believed that the series regulars were on "top form," adding "the more abrasive aspects of Amy Pond's personality seem to have been toned down this year, and Karen Gillan responds with her best, most sympathetic performance to date.
[33] Gavin Fuller of The Daily Telegraph believed it was "a cracking start to the first part of the 2011 series, with the shocking ending of Amy seemingly shooting a girl making one keen wait for the conclusion next week to see how it all resolves itself," as well as enjoying the concept of the Silence.
[34] Rick Marshall of MTV believed that "Steven Moffat and the Doctor Who crew offer up yet another great episode," but also said the "big cliffhanger will likely cause more than a few fans' heads to explode.
"[35] Simon Brew of Den of Geek thought the episode was "a triumphant return for Doctor Who, bubbling with confidence and throwing down story strands that hint at an engrossing series.
Brew also complimented Haynes' work in the United States, saying it was an improvement from "Daleks in Manhattan", which featured British actors attempting to play with American accents.
[37] Kevin O'Sullivan of The Sunday Mirror was more negative towards the episode, stating it was "impossible to understand," and for "strictly sci-fi nerds only," adding that Smith "remains a derivative Doctor who brings nothing new to the party.