In the last days of World War II in Europe, Captain America, due to enhancement by a "Super-Soldier Serum", prevents the Nazis from launching an intercontinental missile. They are also soon revealed to be shape-shifting extraterrestrials led by one acting as SS officer Herr Kleiser. The exploding missile knocks the Captain out and he falls into the icy waters of the North Atlantic, presumed dead. 60 years later, Captain America is found and revived by a S.H.I.E.L.D. team led by General Nick Fury. Bruce Banner and Betty Ross lead a team of scientists working to recreate the Super-Soldier Serum in order to try to stop the real power that backed the Nazis - the alien Chitauri. Banner thinks the Super-Soldier Serum is the key to him controlling the Hulk, and he secretly uses his blood to try to create a cure, instead of using candidates that had been selected for the rebirth procedure. As Captain America reunites with his old friend James "Bucky" Barnes, he also learns that his past lover Gail Richards, is married to him and has lived a happy life. Despite being happy for his friends and everyone that he loved, Captain America still feels lost in the present world he is in, unable to find happiness like he wants to.
Mala (Evan Rachel Wood) and her friend Senn (Justin Long) are young alien creatures who live on Terra, a planet from a star system in the Milky Way. Terra is a peaceful planet of alien creatures who have a rich semi-advanced culture.
A NASA spacecraft has landed on an unknown planet and begins to take rock and soil samples. Four aliens discover it and are sucked up through its vacuum, after which it makes its way back to Earth. The aliens are able to escape from a military base by using their powers (with which they can destroy or heal anything they touch). During the escape, the youngest one hides in a passing van, occupied by a wheelchair-bound boy named Eric Cruise, his older brother, Michael, and their single mother, Janet, who are moving to California from Illinois.
In 2005, Unicron, a roaming artificial planet, devours robot planet Lithone. Elsewhere, the evil Decepticons control the Transformers' homeworld, Cybertron. The heroic Autobots are using two of Cybertron's moons as staging areas, preparing to strike against the Decepticons. In need of energon cubes, an Autobot shuttle is readied for launch to Autobot City on Earth. The Decepticons ambush the shuttle, killing Brawn, Prowl, Ratchet and Ironhide, intending to use the ship to infiltrate Autobot City.
After a NASA deep-space probe (sent to verify the existence of extraterrestrial life within the solar system) crash lands in Mexico, extraterrestrial life forms spread throughout the Mexico–United States border region, leading to the quarantine of the northern half of Mexico. US and Mexican troops battle to contain the creatures, and a wall stretching along the American border ostensibly keeps the US protected.
The film, set between 1953 and 1960, opens with an unknown entity (Keith David) narrating that it has witnessed the evolution of life on Earth and has decided to eradicate mankind because of its capacity of violence and destruction. At the end of the Korean War, United States Air Force pilot Hal Jordan (David Boreanaz) and his wingman, Kyle "Ace" Morgan (John Heard), are attacked by enemy pilots. Hal is shot down, ejects to safety and is forced to kill a North Korean soldier, causing him to be hospitalized for mental trauma. At Gotham Observatory, scientist Dr. Saul Erdel inadvertently teleports J'onn J'onzz (Miguel Ferrer)—the last survivor of the Green Martian race—to Earth. The shock of J'onn's sudden appearance causes Erdel a heart attack. Unable to return to Mars, J'onn disguises himself as Erdel and takes his wallet and identification.
A series of strange abductions have occurred in Gotham City, Central City, Coast City and Metropolis among others. Video footage suggests that Batman, a wanted, costumed vigilante, is behind the incidents. When a mysterious, burly, cloaked kidnapper abducts a woman, Green Lantern (Hal Jordan) arrives to confront the kidnapper and saves the woman when she is dropped from above. Green Lantern then attacks the kidnapper, revealing it to be a monstrous Parademon. The creature defeats Green Lantern soundly, and as he is about to be killed, Batman appears and attacks the Parademon, trying to interrogate it. The Parademon then attacks both heroes. They escape from the city's police and chase the creature into the sewers, where it charges a Mother Box and explodes. Batman and Green Lantern examine the box, deduce that it is of extraterrestrial origin, and decide to ask Superman for an answer. Another Mother Box, supplied by The Flash (Barry Allen) is being studied at S.T.A.R. Labs. Doctor Silas Stone, father of Vic Stone, deliberately misses his son's football game so he can study the box. Arriving in Metropolis, Batman and Green Lantern fight Superman—who has fought a Parademon previously and believes the heroes are working with it. The battle spreads over a portion of the city; it finally stops when Batman calls Superman "Clark". Superman uses his x-ray vision and recognizes Batman as billionaire Bruce Wayne. The three heroes then begin to collaborate. On planet Apokolips, Darkseid orders Desaad to begin an invasion of Earth in response to the superheroes' discovery of his plans.
The sun of the Green Lantern homeworld, Oa, is becoming a gateway for Krona, an evil anti-matter alien tyrant that once sought to destroy all life. As precaution the Guardians of the Universe decide to evacuate Oa of all valuables, such as the Central Battery. While in line to charge their rings before the Battery is taken away, Green Lantern Corps rookie Arisia Rrab converses with Hal Jordan and expresses her self doubts as the newest Green Lantern. In response, Hal tells her the story of the first Green Lantern:
On the night of a meteor shower, young David Gardner sees an alien spacecraft land in a sand quarry behind his house. This is the beginning of an alien invasion that sees David's parents (George and Ellen Gardner), his teachers and the townspeople slowly assimilated by the alien life forms, returning with less emotions. The only one who believes David is the school nurse, Linda Magnuson. Together, David and Linda enlist the aid of the U.S. Marines to help save the world. The film ends when David realizes that everything that has happened was a dream. He tells his parents what happened, and wonders if his dream will become a nightmare, especially when the alien spacecraft begins to land, and David witnesses something that terrifies him so much that he begins screaming, but remains unseen to the audience.
While visiting his mother's grave, Barry Allen, known as the Flash, is alerted to a break-in by Captain Cold, Captain Boomerang, Heat Wave, Mirror Master, and the Top at the Flash Museum. Defeating the Rogues, he discovers that they have been hired by his archenemy Professor Eobard "Zoom" Thawne, the Reverse-Flash as part of a plan to destroy Central City. With the help of the Justice League, Barry foils Zoom's plot, but Zoom's taunts over the death of his mother still haunt Barry as he departs.
After the death of his protégé Jason Todd, billionaire industrialist Bruce Wayne was forced to retire from his Batman persona. Ten years later, Gotham City is overrun with crime and terrorized by a gang known as the Mutants. The 55-year-old Wayne maintains a friendship with 70-year-old retiring Police Commissioner James Gordon, while the Joker (Batman's archenemy) has been catatonic in Arkham Asylum since Wayne's retirement. Arkham inmate and former district attorney Harvey Dent undergoes plastic surgery to repair his disfigured face. Although he is declared sane, he quickly goes into hiding following his release. Dent's disappearance, news stories of the crime epidemic throughout the city and the memory of his parents' deaths drive Wayne to become Batman once more. He combats serious crimes, rescuing 13-year-old Carrie Kelley, but now struggles with the physical limitations of age.
During one long night in a small rural Pennsylvania town in July 1957, teenager Steve Andrews (Steve McQueen) and his girlfriend, Jane Martin (Aneta Corsaut), are kissing on a lovers' lane when they see a meteor crash beyond the next hill. Steve decides to look for it. An old man (Olin Howland) living nearby finds it first. When he pokes the meteorite with a stick, it breaks open, and the small jelly-like blob inside attaches itself to his hand. In pain and unable to scrape or shake it loose, the old man runs onto the road, where he is nearly struck by Steve's car. Steve and Jane take him to Doctor Hallen (Stephen Chase).
Walking home on Bonfire Night through "The Ends" in Brixton, new-to-the-area nurse Samantha Adams is mugged by a small gang of teenage hoodlums: Pest, Dennis, Jerome, Biggz, and leader Moses. The attack is interrupted when a meteorite falls from the sky into a nearby car, giving Samantha the chance to escape. As Moses searches the wreck of the car for valuables, his face is scratched by a pale, hairless, eyeless dog-sized creature; the object which fell from the sky was its cocoon. The creature runs away, but the gang chase and kill it. Hoping to gain fame and fortune, they take the corpse to their acquaintance, cannabis dealer Ron, to get advice on what to do. He lives at the top of their tower block, Wyndham Tower.
The film begins with three furry aliens--the blue Mac (Goldblum), the yellow Zeebo (Wayans), and the red Wiploc (Carrey)--traveling in a space ship. It's been a long time since they've had female companionship, and they receive a broadcast showing human females. They are titillated by these "hairless", shapely creatures and discover that the broadcast came from Earth, so they set off toward Earth and Southern California.
Kreton (Jerry Lewis) is an alien from outer space who is fascinated by human beings. Against the wishes of his teacher, he repeatedly visits Earth. During his latest visit, his teacher reluctantly agrees to allow him to stay and study the humans. He becomes friends with a suburban family and stays with them, after they agree to keep his alien status a secret. Along the way, he falls in love with their daughter (Joan Blackman). However, there is a force field around him that prevents any physical contact as his race has abolished any form of affection.