A young Cro-Magnon woman named Ayla (Daryl Hannah) is separated from her family and orphaned during an earthquake. She is found by a group of Neanderthals and raised as one of their own.
Two pilots named Shoichi Tsukioka and Koji Kobayashi are hunting for schools of fish for a tuna cannery company in Osaka. Kobayashi's plane malfunctions and is forced to land near Iwato Island, an uninhabited strip of rocks formed by volcanic eruptions. Tsukioka then looks for Kobayashi and finds him safe, with only a wrist sprain. While talking, the two men hear some strange sounds and find two monsters fighting. Tsukioka immediately recognizes one of the monsters to be Godzilla. The two monsters then fall off a cliff, into the ocean.
Giant insectoid aliens from a dying planet in "Space Hunter Nebula-M" plot to colonize the Earth. The aliens assume the forms of dead humans and work as the development staff of the peace-themed theme park, World Children's Land, the centerpiece of which is "Godzilla Tower". The Nebula-M aliens plan to use the space monsters Gigan and King Ghidorah, guided by two "Action Signal Tapes," to wipe out human civilization.
Set in the American Southwest, Doc (Raphael Sbarge) is an alcoholic security watchman protecting digging equipment from environmental activists, though he befriends one of them named Thrush (Jennifer Runyon). Meanwhile, Dr. Jane Tiptree (Diane Ladd) of the Eunice Corporation is breeding a strain of extra large and fertile chickens by splicing their DNA with that of crocodiles, iguanas, albatrosses, vultures, pelicans, turkeys and ostriches. Unknown to the Corporation's sponsors however, Tiptree is impregnating several of the chickens with dinosaur DNA. One of her resulting creatures, a Deinonychus, escapes and kills the activists, as well as other civilians. Doc investigates and discovers that Tiptree is also creating a virus which causes women to fatally conceive baby dinosaurs, in order to wipe out humanity and thus allow Carnosaurs and Raptors to reclaim the Earth as their own. Tiptree dies giving birth to a baby raptor. After narrowly escaping a Tyrannosaurus and the lab, Doc takes Thrush to a house to recover and injects a serum to cure her. Doc battles the Tyrannosaurus with a skidsteer (an action that was repeated in the fourth sequel) before impaling it. The government infiltrates the community in order to "sterilize" the situation by shooting all the civilians, infected or not. Thrush dies from the virus, meaning that the serum did not work. Doc is shot and killed by government soldiers, who then burn his and Thrush's bodies.
At the close of the 20th century, all of the Earth's kaiju have been collected by the United Nations Science Committee and confined in an area known as Monsterland, located in the Ogasawara island chain. A special control center is constructed underneath the island to ensure that the monsters stay secure, and to serve as a research facility to study them.
In the small mining village of Kitamatsu, on the southern Japanese island of Kyushu, two miners have gone missing. The two men, Goro and Yoshi, had brawled earlier that day, and after they entered the mine to start their shift, the shaft had quickly flooded. Shigeru Kawamura (Kenji Sahara), a tunneling and safety engineer at the mine, heads below to investigate and makes a gruesome discovery: Yoshi's lacerated corpse. Above ground, a doctor examines Yoshi, and discovers the cause of death to be a series of deep gashes caused by an abnormally sharp object. Some of the miners and their families begin to discuss the possibility of the involvement of Goro, who is still unaccounted for, in the death. Shigeru is personally affected by this incident, since his fiancée Kiyo (Yumi Shirakawa) is also Goro's sister.
Strange events are taking place in Okinawa. An Azumi priestess has a terrifying vision of a city being destroyed by a giant monster. A type of metal not found on earth is discovered in a cave by a spelunker, Masahiko Shimizu, who takes it to Professor Miyajima for examination. An excavation led by Masahiko's brother Keisuke accidentally uncovers a chamber filled with ancient artifacts and a mural bearing an ominous prophecy: "When a black mountain appears above the clouds, a huge monster will arise and try to destroy the world; but then, when the red moon sets and the sun rises in the west, two more shall appear to save humanity." Keisuke is joined by archaeologist Saeko Kaneshiro, who translates the prophecy and takes one of the artefacts, bearing the likeness of the legendary monster King Caesar, to study. Two men stalk them, one who speaks to them and claims to be a reporter interested in the story, the other of whom attempts to steal the statue from them but fails and flees.
From a lost expedition to a plateau in Venezuela, Paula White brings the journal of her father explorer Maple White to the eccentric Professor Challenger in London. The journal features sketches of dinosaurs which is enough proof for Challenger to publicly announce that dinosaurs still walk the earth. Met with ridicule at an academic meeting at the Zoological Hall, Challenger reluctantly accepts a newspaper's offer to finance a mission to rescue Maple White. Professor Challenger, Paula White, sportsman Sir John Roxton, news reporter Edward Malone (who is a friend of Roxton and wishes to go on the expedition to impress his fiancée), a sceptical professor Summerlee, an Indian servant Zambo, and Challenger's butler Austin leave for the plateau.
Evil Moon robot Ro-Man Extension XJ-2 (George Barrows), referred to as just Ro-Man, has seemingly destroyed all human life on Earth with a Calcinator death ray, all except for eight humans that remain alive. The survivors are an older scientist (John Mylong), his wife, two daughters, his young son Johnny (Gregory Moffett), his assistant, and two space pilots that shortly take off in a spaceship for an orbiting space platform. All eight have now developed an immunity to Ro Man's death ray, having received an experimental antibiotic serum developed by the scientist.
In the year 1973, the most recent underground nuclear test, set off near the Aleutians, sends shockwaves as far south as Monster Island, disturbing the monsters, causing Anguirus to fall into a fault opened up by the consequential earthquakes and Rodan to fly off, while Godzilla decides to stay put.
Continuing after the end of the previous film, Interpol agents, led by Inspector Kusaka, search for the wreck of Mechagodzilla at the bottom of the Okinawan Sea. Using the submarine, Akatsuki, they hope to gather information on the robot's builders, the alien simians. The Akatsuki is suddenly attacked by a giant aquatic dinosaur called Titanosaurus, and the crew vanishes.
The story picks up about a month after the dramatic finale of the previous film and follows the further adventures of filmmaker Carl Denham, now implicated in numerous lawsuits following the destruction wrought by Kong. Denham leaves New York with the captain of the Venture, Captain Englehorn, who is certain it is just a matter of time before he is similarly served. Their efforts to make money shipping cargo around the Orient are less than successful. In the Dutch port of Dakang, Denham is amused to see there's a "show" being presented, so he and Englehorn attend. It turns out to be a series of performing monkeys, capped by a song ("Runaway Blues") sung by a young woman named Hilda.
2047. Vingt neuf ans ont passé depuis l'affrontement nucléaire entre les Terriens et les nazis de la lune. Neomenia, l’ancienne base lunaire des nazis, est devenue le dernier refuge de l’Humanité, car la Terre a été dévastée par le conflit. Cependant, ses entrailles cachent une puissance qui pourrait sauver les derniers humains … ou les détruire définitivement. Face à la menace, quelques réfugiés de la Lune vont se rendre au centre de la Terre. Ils y affronteront une race reptilienne extraterrestre.
Littlefoot and his friends head out to the Mysterious Beyond to find Littlefoot's father Bron after he fails to return to the Great Valley and mysteriously disappears.
Ne voyant pas son papa revenir de voyage, Petit Pied, accompagné de ses fidèles amis, Céra, Becky, Pétri et pointu décident de partir tous ensemble à sa recherche mais seront confrontés a un dent tranchante a corne redoutable…