Une expédition arrive sur Mars et découvre des Martiens pacifistes. La fille du leader martien accepte de les accompagner sur la Terre pour délivrer un message de paix.
Late one night, young David MacLean (Jimmy Hunt) is awakened by a loud thunderstorm. From his bedroom window, he sees a large flying saucer descend and disappear into the sandpit area behind his home. After rushing to tell his parents, his scientist father (Leif Erickson) goes to investigate David's claim. When his father returns much later in the morning, David notices an unusual red puncture along the hairline on the back of his father's neck; his father is now behaving in a cold and hostile manner. David soon begins to realize something is very wrong: one-by-one he notices certain townsfolk are acting in exactly the same way. Through his telescope, David sees child neighbor Kathy Wilson walking in the sandpit, when she suddenly disappears underground. David flees to the police station for help, and he is eventually placed under the protection of health-department physician Dr. Pat Blake (Helena Carter), who slowly begins to believe his crazy story.
In Kentucky, a family watches an enormous horde of cattle running past their home, having caught fire, and a flying saucer leaving Earth. The ship explodes before it returns to Mars, and hundreds of other Martian ships leave Mars and head towards Earth.
Dop mène ses compagnons martiens sur Terre dans une quête interplanétaire de femmes. Dop prouve que les Martiens ont un goût impeccable lorsque l'une de ses premières conquêtes s'avère être la scientifique sexy Dr Marjorie Bolen.
Nine-year-old Milo (Seth Green, voice-over by Seth Dusky) is just beginning summer vacation, and his father (Tom Everett Scott) is leaving for a business trip. While Milo is wanting his summer to be a fun one, his mother (Joan Cusack) assigns him chores and tasks like taking out the trash. At dinnertime, Milo is given broccoli. His mother has a "no broccoli, no TV" rule which Milo cleverly evades. When Milo feeds his broccoli to his cat, his mom grounds him and sends him to bed early. After a heated argument with his mother, Milo wishes that he never had a mom. Later that night, his wish comes true when his mother is abducted by Martians who plan to steal her "momness" to rear their own young.
En 2020, la NASA envoie pour la première fois une équipe d'astronautes sur Mars. Mais peu de temps après leur arrivée, ils sont confrontés à un phénomène surnaturel d'une puissance terrifiante et toutes les communications sont coupées. Une mission de sauvetage est alors envoyée à leur recherche...
The film opens on Mars, showing the last moments of a Mars rover's mission. As the rover prepares to sample a Martian rock, the rover loses power and becomes inoperable. The scene pans up from the dead rover to show a huge, undiscovered Martian city just beyond the rock the rover was about to sample. A spaceship is seen quickly rocketing from the city and accelerating into space.
Four men and a woman blast into outer space from the White Sands Proving Ground aboard the RX-M (Rocketship Expedition-Moon) on humanity's first expedition to Luna. Halfway to their destination, the RX-M's engines shut down; the problem is resolved by recalculating the fuel mixture ratios and then moving around some of the propellent tanks and their connecting hoses. When the engines are reignited, the RX-M rapidly careens out of control, accidentally setting the spaceship on a runaway course heading beyond the Moon and into deep space. During this burst of rapid acceleration, the crew, one by one, becomes unconscious due to a drop in oxygen pressure. The engines are shut off just in time. At some later time, perhaps many days, they slowly come around. The revived crew soon discovers the RX-M has traveled some 50,000,000 miles while they were unconscious. Against all odds, this surprising sequence of events has put them on a direct course heading toward Mars. They also notice the RX-M's speed is still increasing, this time due to gravitational attraction: the Red Planet is drawing them in. They quickly calculate they are only 50,000 miles away. This forces Dr. Karl Eckstrom (John Emery) to "pause and observe respectfully while something infinitely greater assumes control.
Malgré son refus, Bugs est envoyé sur la Lune. Il rencontre bientôt Marvin le Martien, qui veut détruire la Terre en utilisant un pétard (en réalité un modulateur spatio-temporel) comme propulseur. Bugs vole le modulateur, et Marvin envoie alors son chien K-9 pour le récupérer. Le lapin lui fait le coup du miroir, et s'échappe.