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Moonfall
In 2011, astronauts Brian Harper, Jocinda "Jo" Fowler, and Alan Marcus are on a Space Shuttle mission to repair a satellite. A mysterious swarm of alien technology attacks the orbiter, killing Alan and knocking Jo unconscious before tunneling into the surface of the Moon. Brian, the only witness to the swarm, returns the crippled shuttle to Earth, but his story is dismissed, and he is fired from NASA.
Ten years later, conspiracy theorist K.C. Houseman, who believes that the Moon is an artificial megastructure, surreptitiously gains access to a research telescope. He discovers that the Moon's orbit is veering closer to Earth. He tries to share his findings with Brian. NASA also discovers the anomaly. K.C. anonymously announces his observation on social media, which leads to a global panic. Jo, now NASA's deputy director, launches a spacecraft on an SLS Block 1B+ rocket to investigate the abnormality. After the astronauts drop a probe into a miles-deep artificial shaft that has opened up on the Moon's surface, the alien swarm attacks, killing all three lunar astronauts.
The lunar orbit continues to decay, and as the Moon falls closer and closer to the Earth, seismic and gravitational disturbances occur. Jo meets former NASA official Holdenfield, who reveals that Brian was discredited because of a NASA coverup dating back to Apollo 11. During the first Moon landing, a two-minute radio blackout was meant to conceal evidence of pulsating lights on the Moon's surface. Apollo 12 revealed that the Moon is hollow. A military electromagnetic pulse (EMP) device was created to eliminate the swarm, but the project was abandoned for budgetary reasons.
With help from her ex-husband General Doug Davidson, Air Force Chief of Staff, Jo requisitions the EMP and commandeers retired Space Shuttle Endeavour from a museum to serve the new mission: to correct the Moon's orbit and destroy the swarm. Brian, K.C., and Jo launch with the EMP, using the Moon's gravity, narrowly escaping to orbit as a tsunami destroys Vandenberg Air Force Base.
They reach the interior of the Moon, revealed to be a Dyson sphere powered by a white dwarf at its center. The Dyson sphere's AI operating system explains to Brian that billions of years ago, the technologically advanced ancestors of modern humans created the AI swarm to serve them, but upon becoming self aware, it went rogue and they were eradicated by it. They built the Moon as an interstellar ark to create the Earth and then seed life on it, but the AI swarm discovered it and began siphoning energy from its power source, destabilizing its orbit.
Meanwhile, Brian's son Sonny, Jo's son Jimmy, and Jimmy's caretaker Michelle try to reach Doug's military bunker in the Colorado mountains. They find Brian's ex-wife and Sonny's mother Brenda, her husband Tom, and their family. They avoid disasters caused by the Moon's proximity and fight other hostile survivors, then reach safety in a mountain tunnel.
As the Moon strips away the local atmosphere, Tom's youngest daughter runs out of oxygen. The injured Tom gives her his own supply; he suffocates to death. The President of the United States orders a nuclear strike on the approaching Moon, but Doug refuses to comply, with debris collapsing the bunker shortly thereafter, apparently killing everyone inside.
As the swarm attacks all electronic objects containing organic life inside, K.C. lures the swarm away from their spacecraft with their lunar module, sacrificing himself to detonate the EMP. Jo and Brian return to Earth, reuniting with their families, and the Moon's power is restored, returning to its regular orbit, but now shed of its rocky exterior. Reconstructing K.C.'s consciousness, the Moon's operating system appears to K.C. as his cat Fuzz Aldrin and his mother, who remarks that they must now "get started".