A representative of an alien race that went through drastic evolution to survive its own climate change, Klaatu comes to Earth to assess whether humanity can prevent the environmental damage they have inflicted on their own planet. When barred from speaking to the United Nations, he decides humankind shall be exterminated so the planet can survive.
When Gonzo's breakfast cereal tells him that he's the descendant of aliens from another planet, his attempts at extraterrestrial communication get him kidnapped by a secret government agency, prompting the Muppets to spring into action to rescue their friend.
Three bounty hunters from space fly back to the town of Grovers Bend, hoping to save local residents from a new batch of Critter eggs.
After crash-landing on an alien planet, an asteroid miner must contend with the challenges of his new surroundings, while making his way across the harsh terrain to the only other survivor – a woman who is trapped in her escape pod.
When a group of trespassing seniors swim in a pool containing alien cocoons, they find themselves energized with youthful vigor.
A spacecraft is discovered at the bottom of the Pacific Ocean, presumed to be at least 300 years old and of alien origin. A crack team of scientists and experts is assembled and taken to the ocean floor to investigate. However, the ship is not as it seems and when a giant perfect sphere is discovered in the cargo bay, things begin to fall apart.
The sensationalist reporter Michelle Fox presents the TV show Weird World, with phony matters about UFOS and aliens. When she hears about Cat, a young woman that claims that have been abducted with her boyfriend and become pregnant by aliens, she convinces her chief to travel with a team to the remote Welsh island of Scalled to interview Cat. She invites the cameraman Ricky Anderson with his sound technician partner; the nerd expert in "ufology" and "ley lines" Gavin Gorman; the actress Candy Vixen and an obscure gay actor to prepare the matter. They get a van and wait for the low tide to reach the island, and when they find evidences that aliens are really landed in the location, the ambitious Michelle decides to film her way to fame and wealth.
After a college jock sees two mysterious orbs of light in the sky, he meets up with an estranged friend to confirm if what he saw was extra-terrestrial.
On a planet far away, a primeval creature gets banished by the chief of its tribe. Exiled and with the burden of a disgraced honour, it sets foot into the unknown land beyond its home, where it finds an intriguing alien concept to take vengeance.
12-year-old David is accidentally knocked out in the forest near his home, but when he awakens eight years have passed. His family is overjoyed to have him back, but is just as perplexed as he is that he hasn't aged. When a NASA scientist discovers a UFO nearby, David gets the chance to unravel the mystery and recover the life he lost.
After receiving a VHS tape claiming she's a disciple of an alien species known as the "True Mothers," Amy joins a local UFO cult, donning the name Celisse and befriending a number of other members while under the watch of the cult's peculiar founder, Ascensia.
A young man believes that his country's leaders are actually toxic reptilian aliens sent down to launch a takeover of his beloved Earth. So he decides to abduct them and force the truth out on camera in his basement that doubles as a film studio and torture chamber.
A crew of miniature aliens operate a spaceship that has a human form. While trying to save their planet, the aliens encounter a new problem, as their ship becomes smitten with an Earth woman.
Saber Raine is hired to guide three elite soldiers on a rescue mission to recover a prince and princess who have been abducted from their home world. The trail leads Saber and his allies to a planet deep within uncharted space that is inhabited by strange mutated creatures.
The town of Newnan are seeing little green men everywhere. The military have arrived and are on the lookout for UFOs. Everyone's high strung and Sheriff Hall (Bud Spencer) is left to deal with the aftermaths of the hysteria. On his way home from patrol he happens upon a little boy claiming to be an alien by the name of H7-25. At first the sheriff doesn't believe the boy, but with the mounting evidence, even he must eventually concede. Soon the military is after Sheriff Hall and H7-25, and it is up to the sheriff to keep the boy safe and beat up large swaths of soldiers so H7-25 can go home.
Four talented alien musicians are kidnapped by a record producer who disguises them as humans. Shep, a space pilot in love with bass player Stella, follows them to Earth. Reprogrammed to forget their real identities and renamed The Crescendolls, the group quickly becomes a huge success playing soulless corporate pop. At a concert, Shep manages to free all the musicians except Stella, and the band sets out to rediscover who they really are — and to rescue Stella.
A valuable medallion believed to prove that aliens from outer space visited Earth in prehistoric times is sought.
A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates.
The TARDIS brings the Doctor, Susan, Barbara, and Ian to the planet Skaro where they meet two indigenous races — the Daleks, malicious mutant creatures encased in armoured travel machines, and the Thals, beautiful humanoids with pacifist principles. They convince the Thals of the need to fight for their own survival.
The Yolkians have come to earth, but this time they seek out only peace and brotherhood with the people of Retroville. While Jimmy Neutron suspects the worst, everyone in town is ready to forgive and forget. This special serves as a direct sequel to the Jimmy Neutron movie.