In the small town of Oakey Oaks, Chicken Little rings the school bell and warns everyone to run for their lives, allowing the whole town into a frenzied panic with much damage ensuing. Eventually, the Head of the Fire Department calms down enough to ask him what's going on and Little explains that a piece of the sky shaped like a stop sign had fallen on his head when he was sitting under the big oak tree in the town square; however, he is unable to find it. His father, Buck Cluck, assumes that this "piece of sky" was just an acorn that had fallen off the tree and had hit him on the head, making Little the laughing stock of the town.
In 2005, scientists discover an extrasolar planet, which they name Planet G, with conditions similar to Earth. In 2006 NASA transmits a powerful signal from a communications array in Hawaii. Meanwhile, slacker Alex Hopper gets arrested while attempting to impress Sam Shane, daughter of U.S. Pacific Fleet commander Admiral Terrance Shane. Stone Hopper, Alex's older brother and a naval officer, is infuriated at Alex's lack of motivation and forces Alex to also sign up and earn a commission in the U.S. Navy.
Flint Lockwood is a wannabe-scientist who lives in Swallow Falls, a tiny island in the middle of the Atlantic Ocean that has sardines as the base of its economy. Flint lives with Tim, his widowed technophobic father who misunderstands his son's talent, and his pet monkey, Steve. Despite Flint's zealous enthusiasm, his inventions, including spray-on shoes, a remote controlled television, rat birds, hair-un-balder, and a flying car, all ended in failure.
Dans les années 1920, les parents de Katherine Coleman apprennent que leur fille possède un don pour les sciences, qu'elle doit parfaire en fréquentant une école pour Noirs (les Blancs étant dans des écoles séparées) car elle est dotée d'aptitudes intellectuelles supérieures. En 1962, devenue mathématicienne, Katherine Coleman (désormais Goble) travaille au sein d'un groupe de calculatrices humaines, sur le campus ouest du Centre de recherche Langley à Hampton, en Virginie, aux États-Unis, avec deux amies et collègues : l'aspirante ingénieure Mary Jackson et la superviseure d'équipe Dorothy Vaughan. À la suite du lancement réussi de Spoutnik 1, Al Harrison, directeur du Space Task Group, exige encore plus d'efforts de la part des employés sous sa supervision, de crainte que les Soviétiques ne mettent en orbite une bombe H pouvant exploser au-dessus du sol américain. Goble est envoyée dans son groupe pour vérifier les calculs, devenant la première Afro-Américaine à participer à ce groupe de recherche. Au début, elle est ignorée de ses collègues blancs et doit travailler à partir de données partiellement masquées (Goble n'ayant pas le niveau d'habilitation nécessaire) sous les ordres de Paul Stafford, un homme croyant en sa supériorité intellectuelle et refusant de reconnaître le travail de Katherine.
In 1928, a solitary mountaineer encounters a glowing sphere. He loses consciousness and when he wakes, the sphere has gone and there is a scar on his hand where a sample of his DNA has been taken.
As a man heads into space to prevent climate-controlling satellites from creating a storm of epic proportions, his brother discovers a plot to assassinate the president.
While climbing in Monument Valley, siblings Peter (O'Donnell) and Annie Garrett (Tunney) lose their father, Royce (Stuart Wilson). After two falling amateurs leave the family dangling, Royce forces Peter to cut him loose to save Peter and his sister. Peter has since retired from climbing and is a full-time wildlife photographer, and Annie has become a renowned mountain climber. Three years later during an wildlife shooting at lower Himalayans in Pakistan, Peter's assistant falls and injures his leg. Peter is dropped off at K2 base camp and searches for Annie who is planning a summit attempt on K2, the world's second highest and most dangerous mountain, due to unpredictable weather conditions and difficult technical climbing sections. The expedition is funded by wealthy industrialist Elliot Vaughn (Paxton) who is also part of Annie's expedition, with the help of renowned climber Tom McLaren (Nicholas Lea).
In March 1996, several commercial expeditions arrive at Mount Everest base camp to prepare for a climb to the summit. Rob Hall, who first popularized guided Everest climbs, is the leader of Adventure Consultants, whose clients include Beck Weathers, an experienced climber; Doug Hansen, a former mailman pursuing his dream; and climbing veteran Yasuko Namba, who is hoping to complete her last of the Seven Summits. Scott Fischer is the chief guide for competitor Mountain Madness. Helen Wilton is Rob's base camp manager.
Motaba, a fictional virus which causes a deadly fever, is discovered in the African jungle in 1967. To keep the virus a secret, U.S. Army officers Donald McClintock (Donald Sutherland) and William Ford (Morgan Freeman) destroy the camp where it was found.
On the MS Poseidon, a luxury ocean liner, former New York City Mayor and fireman, Robert Ramsey (Kurt Russell), is traveling with his daughter Jennifer (Emmy Rossum) and her boyfriend Christian (Mike Vogel), soon to be engaged. Also on board is professional gambler Dylan Johns (Josh Lucas), architect Richard Nelson (Richard Dreyfuss), Maggie James (Jacinda Barrett) and her son, Conor (Jimmy Bennett), stowaway Elena (Mía Maestro), and waiter Valentin (Freddy Rodriguez).
Dr. Harry Dalton (Pierce Brosnan), a volcanologist of the United States Geological Survey, and his partner Marianne (Walker Brandt), are studying volcanic activity in Colombia when the volcano erupts. Marianne is killed by a piece of falling debris, leaving Harry remorseful about her death, believing it could have been prevented by evacuating sooner.
The film is presented as found footage from a personal video camera recovered by the United States Department of Defense. A disclaimer text states that the footage is of a case designated "Cloverfield" and was found in area US447 "formerly known as Central Park". The video consists primarily of segments taped the night of Friday, May 22, 2009. Occasionally, older segments are shown from a previous video that was mostly taped over.
While moving a train pulled by engines #777 and #767 at the Veteran Allegheny and West Virginia Railroad (AWVR) trainyard in the fictional city of Fuller Pennsylvania, the two hostlers Dewey and Gilleece take ill-advised shortcuts and accidentally allow the engine to leave the trainyard on its own power without the air brakes engaged. Initially believing the train to be a "coaster", yardmaster Connie Hooper orders Dewey, Gilleece, and chief welder Ned Oldham to drive and catch up the train to stop it. When Oldham finds that the train has already past where it was supposed to be, they realize that the train is running on full power and now poses a dangerous threat. Dewey and Gilleece manage to catch up to 777 using a high-railing truck, but fail to board the train in time. Hooper alerts Oscar Galvin, director of operations for AWVR, as well instructs the local and state police and sheriffs to secure all the grade crossings to prevent injury. Visiting Federal Railroad Administration safety inspector Scott Werner finds that 8 cars being pulled by 777 contain molten phenol which would be a major disaster if the train should crash or derail in a populated area. News of the runaway train soon becomes a media event.
Alex Shaw is on a motorcycle chase after a vehicle with stolen goods. He eventually catches the driver of the vehicle, but his girlfriend Annie runs into him during her driving test. She finds out that Alex is on the SWAT team after he lied and told her he was a beach cop. As an apology, Alex surprises her with a Caribbean cruise on Seabourn Legend.
On September 11, 2001, Port Authority Police officers John McLoughlin and Will Jimeno are patrolling the Port Authority Bus Terminal in Midtown Manhattan when they see a plane fly dangerously low overhead. As all of the police officers return to the station, they see on TV that the North Tower of the World Trade Center has been hit by the plane. Sergeant McLoughlin assigns many of the officers to assist in a precautionary evacuation attempt of the North Tower and they board a Metropolitan Transit Authority bus. On the bus, they hear reports that the South Tower is also hit by another plane. When they arrive at the World Trade Center, they realize the extent of the disaster, and see one of the victims jump out of the towers to certain death. The men proceed to get safety equipment from Building 5 and enter the concourse between the towers.