In 1995, John Connor is ten years old and living in Los Angeles with foster parents. His mother Sarah Connor had been preparing him throughout his childhood for his future role as the leader of the Human Resistance against Skynet, but was arrested after attempting to bomb a computer factory and imprisoned at a mental hospital under the supervision of Dr. Silberman. Skynet sends a new Terminator, designated as T-1000, back in time to kill John. The T-1000 is an advanced prototype composed of a mimetic polyalloy that allows it to take on the shape and appearance of almost anything it touches, and transform parts of its anatomy into knives and other stabbing weapons. The T-1000 arrives under a freeway, kills a policeman and assumes his identity. Meanwhile, the future John Connor has sent back a reprogrammed T-800 (Model 101) Terminator to protect his younger self.
In 2029, Human Resistance leader John Connor (Jason Clarke) launches a massive final offensive against Skynet, an artificial general intelligence system seeking to eliminate the human race. Before the Resistance wins the offensive, Skynet activates a time machine and sends back a T-800 Terminator to 1984 to kill John's mother, Sarah Connor (Emilia Clarke). John's right-hand man, Kyle Reese (Jai Courtney), volunteers to travel back in time to protect her. As Kyle floats in the machine's magnetic field, he witnesses John being attacked by another Resistance soldier (Matt Smith). He then has visions from his childhood about events in 2017.
John Connor has been living off the grid in Los Angeles in the years following the death of his mother, Sarah, from leukemia. Although Judgment Day did not occur on August 29, 1997, as expected, John still believes that a war between humans and the machines will occur. Unable to locate John in the past, Skynet sends a new model of the Terminator called the T-X back to July 24, 2004 to kill other members of the Human Resistance. The T-X is more advanced than previous Terminators, and has an endoskeleton with built-in weaponry, a liquid metal exterior similar to the T-1000, and the ability to reprogram other machines. Unlike previous Terminators, its standard appearance is female. The Resistance sends a reprogrammed Terminator (T-850 - Model 101) back in time to protect the T-X's targets including John and his future wife, Kate Brewster.
L'an 2563, 300 ans après que la Terre a connu une catastrophe appelée "l'effondrement" consécutive à une guerre contre Mars. Dans la ville d'Iron City infestée par le crime, le Dr Dyson Ido, médecin spécialisé dans les augmentations biomécaniques, cherche des pièces détachées dans une décharge à ciel ouvert venant de Zalem, dernière cité céleste de la planète, surplombant Iron City, et où chacun rêve d'aller. Ido trouve le corps d'une cyborg en piteux état. Il va alors la ramener dans sa clinique pour la réparer. La jeune cyborg se réveille, réparée mais amnésique. Le docteur Ido la rebaptise Alita (du prénom de sa fille décédée) et lui fait découvrir le monde dans lequel ils survivent. Mais Alita se découvre des réflexes combatifs et une force surhumaine, veut toujours en savoir plus et aller plus loin. Elle fait la connaissance d'Hugo, un jeune revendeur de pièces détachées auquel elle se lie rapidement. Alita va tenter de comprendre qui elle est réellement et d'où elle vient. Elle croise la route du terrible Vector, qui contrôle les matches du sport ultra-populaire de la ville, le Motorball.
In 2003, Dr. Serena Kogan (Helena Bonham Carter) of Cyberdyne Systems convinces death row inmate Marcus Wright (Sam Worthington) to sign over his body for medical research following his execution. One year later, the automated Skynet system is activated, begins to perceive humans as a threat, and eradicates much of humanity with nuclear weapons in the event known as "Judgment Day".
In April 2054, Washington, D.C. has a special police force called PreCrime that stops murderers before they act. Murders are predicted using three Precogs, mutated humans who "previsualize" crimes by receiving visions of the future. Over the past six years, PreCrime has successfully reduced the city's murder rate to zero, and the Federal government is on the verge of adopting it, even though the public finds it controversial. Captain John Anderton (Tom Cruise), the head of PreCrime, has been suffering from drug addiction since the unresolved disappearance of his son, Sean, which led to his wife, Lara (Kathryn Morris), divorcing him. With PreCrime poised to go nationwide, the system is being audited by Danny Witwer (Colin Farrell), an agent from the United States Department of Justice. In the middle of the audit, the Precogs generate a new prediction, one saying that Anderton will murder a man named Leo Crow in thirty-six hours. Anderton does not know Crow, but flees the area as Witwer begins a manhunt.
In 2084, Earthbound construction worker Douglas Quaid is having troubling dreams about Mars and a mysterious woman there. His wife Lori dismisses the dreams and discourages him from thinking about Mars, where the governor, Vilos Cohaagen, is fighting rebels while searching for a rumored alien artifact located in the mines. At "Rekall", a company that provides memory implants of vacations, Quaid opts for a memory trip to Mars as a secret agent fantasy. However, during the procedure, before the memory is implanted, something goes wrong, and the story diverges between the question of what is real and what is hallucination. Apparently, Quaid starts revealing previously suppressed memories of actually being a secret agent. The company sedates him, wipes his memory of the visit, and sends him home. On the way home, Quaid is attacked by his friend Harry and some construction coworkers; he is forced to kill them, revealing elite fighting-skills. He is then attacked in his apartment by Lori, who reveals that she was never his wife; their marriage was just a false memory implant and Cohaagen sent her as an agent to monitor Quaid. He is then attacked and pursued by armed thugs led by Richter, Lori's real husband and Cohaagen's operative.
En 1998, trois ans après avoir écarté la menace de Skynet, Sarah et John Connor profitent de la vie sur une plage de Livingston, au Guatemala, lorsqu'ils sont soudainement attaqués par un Terminator T-800. Renvoyé dans le temps par Skynet avant son effacement, le Terminator assassine John avant de disparaître.
En 2049, des humanoïdes issus du génie biologique, appelés réplicants, ont été intégrés dans la société pour assurer la survie de l'humanité. K, l'un des plus récents modèles conçus pour obéir, travaille comme blade runner au LAPD. Sa mission consiste surtout à pourchasser et éliminer les anciens modèles délinquants.
In 2028, multinational conglomerate OmniCorp revolutionizes warfare with the introduction of robotic peacekeepers capable of maintaining law and order in hot spots such as Iran. Led by CEO Raymond Sellars, the company moves to market its tech to domestic law enforcement, but the passage of the Dreyfus Act, forbidding deployment of drones on U.S. soil, prevents this. Aware that most Americans oppose the use of military systems in their communities, Sellars asks Dr. Dennett Norton and his research team to create an alternative. The result is a proposal for a cyborg police officer. However, Norton informs Sellars that only someone who is stable enough to handle being a cyborg can be turned into one, and some candidates are rejected.
At the end of the 21st century, Earth is devastated by chemical warfare. What little habitable land remains is divided into two territories, the United Federation of Britain (UFB, located on mainland Europe) and the Colony (Australia). Many residents of the Colony travel to the UFB to work in factories via "the Fall", a gravity elevator running through the Earth's core. A Resistance operating in the UFB seeks to improve life in the Colony, which the UFB views as a terrorist movement.
Dans un futur proche.
Le Major Mira Killian est unique en son genre. En effet, il y a un an, cette jeune femme a été sauvée d'un terrible accident en transférant son cerveau dans un corps synthétique aux capacités cybernétiques. À la suite de l'opération, elle a tout oublié de son passé. Elle a ensuite rejoint une unité d'élite anti-terroriste, la section 9, pour lutter aux côtés de Batou contre les plus dangereux criminels. Lorsque sévit une menace d'un nouveau genre, capable de pirater et de contrôler les esprits, le Major s'avère être la seule à pouvoir la combattre. Alors qu'elle s'apprête à affronter ce nouvel ennemi, elle découvre qu'on lui a menti ; sa vie n'a pas été sauvée, mais on la lui a volée. Rien ne l'arrêtera pour découvrir son véritable passé, trouver les responsables et les empêcher de recommencer avec d'autres cobayes.
On May 12, 1984, two beings from the year 2029 arrive in Los Angeles: one is a Terminator T-800 Model 101, a cyborg assassin programmed to kill a young woman named Sarah Connor; the other is Kyle Reese, a soldier sent to protect her from the T-800. After the Terminator kills a gang member, a gun-shop manager, the two other women named "Sarah Connor" listed in the telephone directory, Sarah's roommate Ginger, and her partner, it tracks its target to the Technoir, a nightclub. Kyle arrives and saves Sarah from the Terminator. The two steal a car and escape, while the Terminator steals a police car and pursues them.
In a dystopian near-future, Detroit, which is now bankrupt and overrun with crime, gives Omni Consumer Products (OCP) control of its struggling police force. The company plans to replace the poor, run-down sections of Old Detroit with the high-end "Delta City," but must first address the city's high crime rate. As an alternative to existing law enforcement, OCP senior president Dick Jones (Ronny Cox) offers the prototype ED-209 enforcement droid, but it accidentally kills a board member during a demonstration. The OCP chairman, nicknamed "The Old Man" (Dan O'Herlihy), decides instead to back Jones' young rival, Bob Morton (Miguel Ferrer), and his experimental cyborg police officer program, "RoboCop.
In the year after the success of the RoboCop program and Jones's death, Omni Consumer Products (OCP) has created a new plan to have Detroit default on its debt so that OCP can foreclose on the entire city, take over its government, and replace the old neighborhoods with Delta City, a new planned city center independent of the United States government, enabling them to effectively have an entire city to be controlled by OCP.