They Will All Die in Space (Spanish:Morirán en el espacio[4] or Ellos morirán en el espacio)[5] is a 2015 English-language Spanish short science-fiction horror film written, directed and produced by Javier Chillon, about a starship technician (Julio Perillán) who is awoken from cryo-sleep and is told that the vessel is adrift and lost in the cosmos, and that he is needed to help repair the communications system to call for help, but quickly realises that something has gone horrifyingly wrong.

After directing two other short films involving returning astronauts (one of which a chimpanzee), the mockumentary Die Schneider Krankheit (2008)[8] and Decapoda Shock (2011),[9] Javier Chillon wanted to do something a bit more conventional, a film that was "straight up science fiction" with no supernatural elements,[10] something closer to a detective story: he had always liked the idea of a starship stranded in space, and one day the story just came to him.

[7][11] While classic science fiction films like Alien and Outland were major inspirations, Chillon was mainly influenced by what helped inspire those films in the first place: "the whole French new wave of science fiction comic books in the 60s and 70s," such as Métal hurlant, Valérian, and artists such as Moebius, Enki Bilal,[10][11] Juan Giménez, and Frederik Peeters.

[10][12][13][14] The biggest part of the project was the sets, which Chillon and his crew built "from scratch" with a view to minimising the need for CGI,[10] but also for aesthetic reasons related to his influences.

[18] the feature was conceived by Little Terrors short films festival founder Justin McConnell, who directed the narrative frame, and Indiecan Entertainment's Avi Federgreen.

[24] They Will All Die in Space made Shawn Herbert's top ten list of "life changing short films" in 2018, saying it was "an interesting watch, especially for those who enjoy having goosebumps!

[14] Andrew Liptak said it channels the claustrophobic tension of Alien and the desperate situation of Passengers, and "ends with a neat twist that pays off exceptionally well.

[29]Alisha Bunting praises the cinematography, sound design, and the acting, which "matched the film", wishing there had been a bit more shown of the two waking crew interacting while the protagonist is in cryogenesis, and hoped the short would be converted into a feature.