Four teenagers, Kathryn, Kevin, Rudy, and Tish, and a 12-year-old boy, Max, go to space camp at Kennedy Space Center near Cape Canaveral, Florida for three weeks during the summer to learn about the NASA space program and mimic astronaut training. They meet their instructor, Andie Bergstrom, a NASA-trained astronaut who is frustrated that she has not yet been assigned to a shuttle mission. Her bitterness is compounded by the fact that her husband, camp director Zach Bergstrom, is an astronaut who has walked on the moon.
In the distant future, an overcrowded Earth relies on research conducted by scientists in remote stations across the solar system. One of these, a small experimental hydroponics research station on Saturn's third moon, is run solely by Adam (Douglas) and his colleague and lover Alex (Fawcett). Adam, the younger Alex and their dog Sally enjoy their isolation, far from an overcrowded and troubled Earth. The couple have been on Saturn 3 for three years, but Alex has spent all her life in space.
SG-1 discovers a box that they believe contains the Ark of Truth while digging on Dakara, but before they can open it, Ori soldiers arrive, led by Tomin. Daniel tricks them into opening the box, but it is revealed to be a fake. When Tomin is ordered by a Prior to kill them, he refuses, and Mitchell kills the Prior, whose powers were being blocked by the Anti-Prior device. Shocked at the death of their Prior, the Ori soldiers surrender with Tomin returning to Earth with SG-1 where he resides at the SGC for a time.
The film begins in an unnamed war-torn European city in the late 18th century (dubbed "The Age of Reason" in an opening caption), where, amid explosions and gunfire from a large Turkish army outside the city gates, a fanciful touring stage production of Baron Munchausen's life and adventures is taking place. Backstage, city official "The Right Ordinary Horatio Jackson" reinforces the city's commitment to reason (here meaning uniformity) by ordering the execution of a soldier (Sting in a cameo) who had just accomplished a near-superhuman feat of bravery, claiming that his bravery is demoralizing to other soldiers.
SG-1 and Jack O'Neill attend a Tok'ra extraction ceremony for Ba'al, the last of the Goa'uld System Lords. Ba'al claims, however, that he is merely the last clone and that the real Ba'al has a fail-safe plan. The real Ba'al travels back in time to 1939 Earth and massacres the crew of the Achilles, the ship carrying the Stargate to the United States; the captain lives long enough to drop the bomb Ba'al left overboard and keep the ship from being destroyed. In the present, people and objects start disappearing, including Vala Mal Doran and Teal'c. Jack is killed by the clone, but Samantha Carter, Daniel Jackson and Cameron Mitchell reach the Stargate. They are surprised to emerge inside the derelict Achilles, which has drifted to the Arctic — Ba'al's actions have created a timeline in which the Stargate Program never happened. After escaping from the sinking Achilles, they are rescued by a team led by Colonel Jack O'Neill. Although General Landry believes their story (after intensive interrogation), they are denied permission to change the timeline. In the alternate timeline, Daniel is still trying to convince people about his theories of the pyramids, Carter died in a space shuttle accident and Mitchell does not exist at all because his grandfather was the Achilles captain. The three are separated and given new lives to lead.
Interstellar warrior Shep Ramsey (Hulk Hogan) is on a mission to capture intergalactic despot General Suitor (William Ball). The general kidnapped President Hashina, the ruler of an entire planet. Shep boards Suitor's flagship but is unable to rescue Hashina, who is killed by Suitor who then turns into a berserk reptilian alien after Hashina wounds him. Shep barely escapes, but is able to blow up the ship as he does so.
In 2079, there is a colony on the Moon called Little America. A retired smuggler called Pluto Nash (Eddie Murphy), who just left prison, buys a nightclub, in an attempt to fulfil a long-time wish of his. Additionally, this prevents the murder by ingestion of battery acid of the club's previous owner, Anthony Frankowski (Jay Mohr), a Polish polka dancer, by mobsters Gino (Burt Young) and Larry (Lillo Brancato) whom Anthony owed money to. Pluto rebuilds the club and establishes it as "Club Pluto." In the next seven years, Club Pluto becomes a very popular Little America nightclub. Its staff consists of Pluto himself, a Hispanic assistant, and an android named Bruno (Randy Quaid), an inferior 63 plus model.
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.
The year is 2078. The planet Sirius 6B, once a thriving mining hub, has been reduced to a toxic wasteland by a civil war between the mining company, known as the New Economic Block (NEB), and the Alliance, a group of former mining and science personnel. Five years into the war, Alliance scientists created and deployed Autonomous Mobile Swords (AMS) — artificially intelligent self-replicating machines that hunt down and kill NEB soldiers on their own. They are nicknamed "screamers" because of a high-pitched noise they emit as they attack. Screamers track targets by their heartbeats, so Alliance soldiers wear "tabs" which broadcast a signal canceling out the wearer's heartbeat and rendering them "invisible" to the machines.
When their latest rocket test fails and government funding collapses, rocket scientist Dr. Charles Cargraves (Warner Anderson) and space enthusiast General Thayer (Tom Powers) enlist the aid of aircraft magnate Jim Barnes (John Archer). With the necessary millions raised privately from a group of patriotic U. S. industrialists, Cargraves, Warner, and Barnes build an advanced single-stage-to-orbit atomic powered spaceship, named Luna, at their desert manufacturing and launch facility; the project is soon threatened by a ginned-up public uproar over "radiation safety". The three idealists circumvent legal efforts to stop their expedition by simply launching the world's first Moon mission well ahead of schedule; as a result, they must quickly substitute Joe Sweeney (Dick Wesson) as their expedition's radar and radio operator.
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.
In the year 3008, the crew of the Intergalactic Space Police cruiser Infinity is on patrol duty in deep space. The ship is captained by the incompetent Cornelius Butt (Avery Schreiber) and his crewmen: his first officer, Sgt. Thor (Stephen Macht); pilot "space-cowboy" Pvt. Robert "Buzz" McHenry (J.D. Hinton); Maurice (Lionel Mark Smith), a black humanoid alien with pointy ears and bat wings; and Sam (Tad Horino), an Asian man who quotes Confucius. Also aboard is Galaxina (Dorothy Stratten), a voluptuous blonde android servant, and Rock-Eater, a rock-eating alien prisoner confined to the brig.
Three American astronauts – commander Jim Pruett (Richard Crenna), "Buzz" Lloyd (Gene Hackman), and Clayton "Stoney" Stone (James Franciscus) – are the first crew of an experimental space station on an extended duration mission. While returning to Earth, the main engine on the Apollo spacecraft Ironman One fails. Mission Control determines that Ironman does not have enough backup thruster capability to initiate atmospheric reentry, or to re-dock with the station and wait for rescue. The crew is marooned in orbit.
The movie starts out in 1988 with pilot Koji Miyoshi's return to Japan in response to electromagnetic interference that is plaguing the world following a comet scare. Miyoshi is quickly reunited with old friends and acquaintances upon his arrival, although the reunion is cut short as UFOs began to appear all across America as the UN's Space Station Terra is also destroyed in orbit. This series of events prompts Miyoshi to meet with Masato Takigawa and request that the United Nations Space Forces' Gohten Project - construction of the UNSF Gohten, is completed. The request falls on deaf ears until the aliens from the distant planet of Yomi in Messier 13 who have been behind the recent disturbances bungle a plan to kidnap Takigawa, at which point work on the Gohten commences amongst global chaos from attacking Hell Fighter UFO's. Following a fierce battle at the Gohten’s base, the craft is finally launched as it makes its way to Venus, the suspected location of the invaders’ base of operations, to put an end to the alien threat.