Greenland is a 2020 American disaster thriller film directed by Ric Roman Waugh and written by Chris Sparling. The film stars Gerard Butler (who also produced), Morena Baccarin, Roger Dale Floyd, Scott Glenn, David Denman, and Hope Davis, and follows a family who must fight for survival as a planet-destroying comet races to Earth.
Structural engineer John Garrity lives in Atlanta, Georgia with his estranged wife, Allison, and their diabetic son, Nathan. He returns home to watch the near-earth passing of a recently-discovered interstellar comet named “Clarke”, along with his family and neighbors.
While at the grocery store, John receives an automated DHS message saying that he and his family have been selected for emergency sheltering. He then returns home just as a comet fragment is seen entering the atmosphere on live television. Previously expected to land in the ocean near Bermuda, the fragment instead strikes Tampa, Florida, vaporizing most of the state. John then receives a call with instructions to head to Robins Air Force Base for an evacuation flight, as Clarke is on a direct collision course with Earth and the entire planet will be bombarded with hundreds of fragments within the next two days in a cataclysmic event, with one fragment large enough to cause an extinction-level event. John, Allison, and Nathan pack up and flee, unable to take anyone else with them as they would be denied boarding.
At Robins, Nathan’s insulin gets left behind in the car. When John goes to retrieve it, Allison is escorted off the base after Nathan’s medical condition is discovered, disqualifying him. John returns and boards a plane but quickly jumps off upon realizing Allison and Nathan were probably left behind. As John exits the base, a panicked mob breaks in, destroying several evacuation planes when gunfire ignites jet fuel. Returning to the car, John finds Allison’s note saying she and Nathan are going to her father’s home in Lexington, Kentucky. After getting medical supplies from a looted store, Allison and Nathan get a ride from Ralph and Judy Vento, only for Ralph to kidnap Nathan, to Judy’s dismay, in order to use him and the wristbands to board a flight.