Movies Like Stepsister from Planet Weird

When Earth is taken over by the overly-confident Boov, an alien race in search of a new place to call home, all humans are promptly relocated, while all Boov get busy reorganizing the planet. But when one resourceful girl, Tip, manages to avoid capture, she finds herself the accidental accomplice of a banished Boov named Oh. The two fugitives realize there’s a lot more at stake than intergalactic relations as they embark on the road trip of a lifetime.

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When Earth astronaut Capt. Chuck Baker arrives on Planet 51 -- a world reminiscent of American suburbia circa 1950 -- he tries to avoid capture, recover his spaceship and make it home safely, all with the help of an empathetic little green being.

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Ben and a mysterious girl from his past must prevent an alien threat from destroying the world.

A young man finds out that he holds the key to restoring hope and ensuring survival for the human race, while an alien species called the Drej are bent on mankind's destruction.

When an asteroid threatens to collide with Earth, NASA honcho Dan Truman determines the only way to stop it is to drill into its surface and detonate a nuclear bomb. This leads him to renowned driller Harry Stamper, who agrees to helm the dangerous space mission provided he can bring along his own hotshot crew. Among them is the cocksure A.J. who Harry thinks isn't good enough for his daughter, until the mission proves otherwise.

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When an alien takes the form of a young widow's husband and asks her to drive him from Wisconsin to Arizona, the government tries to stop them.

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When the ruthless forces of the Motherworld threaten a quiet farming village on a distant moon, a mysterious outsider becomes its best hope for survival.

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It's the end of the world. Seeking meaning and thrills in their last days alive, Rose and Michael embark on a cross-country road trip to see Rose's grandmother as a devastating asteroid threatens to wipe out life on Earth. Along the way they encounter other lost souls, each with their own very different perspective on the impending doom.

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Meg and Charles Wallace are aided by Calvin and three interesting women in the search for their father who disappeared during a government experiment. Their travels take them around the universe to a place unlike any other.

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An alien similar to Ra appears out of the Stargate, killing five soldiers and kidnapping another, a year after the original Stargate mission. A new team is assembled, including some old members, and they go in search of the missing soldier in order to find out how Ra could still be alive. Meanwhile, the alien Goa'uld kidnap Sha're and Skaara, implanting them with symbiotes and making them Goa'uld hosts.

An alien is left behind on Earth and saved by the 10-year-old Elliott who decides to keep him hidden in his home. While a task force hunts for the extra-terrestrial, Elliott, his brother, and his little sister Gertie form an emotional bond with their new friend, and try to help him find his way home.

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In an alternate universe where twinned worlds have opposite gravities, a young man battles interplanetary prejudice and the laws of physics in his quest to reunite with the long-lost girl of his dreams in this visually stunning romantic adventure that poses the question: what if love was stronger than gravity?

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A parasitic alien soul is injected into the body of Melanie Stryder. Instead of carrying out her race's mission of taking over the Earth, "Wanda" (as she comes to be called) forms a bond with her host and sets out to aid other free humans.

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In a soon to be demolished block of apartments, the residents resist the criminal methods used to force them to leave so a greedy tycoon can build his new skyscraper. When tiny mechanical aliens land for a recharge, they decide to stay and help out.

Since a bitter winter storm stole the life of Gerda's mother, she and her father have sadly continued to run the remote hotel they call home. Lonely and isolated, Gerda's only joy is Kai, the handsome bellboy. A mysterious guest with an icy stare arrives at the hotel one night, wrapped in fur and diamonds. By daybreak, the "Snow Queen" has vanished with Kai! Gerda embarks on a journey of morphing seasons, fantastical creatures, and long-frozen mysteries in a desperate quest to find her stolen love.

During a space voyage, four scientists are altered by cosmic rays: Reed Richards gains the ability to stretch his body; Sue Storm can become invisible; Johnny Storm controls fire; and Ben Grimm is turned into a super-strong … thing. Together, these "Fantastic Four" must now thwart the evil plans of Dr. Doom and save the world from certain destruction.

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A mysterious force knocks the moon from its orbit around Earth and sends it hurtling on a collision course with life as we know it.

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The wildly funny and touching story of a lonely Hawaiian girl and the fugitive alien who helps to mend her broken family.

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The continuing adventures of Lilo, a little Hawaiian girl, and Stitch, the galaxy's most-wanted extraterrestrial. Stitch, Pleakley, and Dr. Jumba are all part of the household now, but what Lilo and Stitch don't know is that Dr. Jumba brought his other alien "experiments" to Hawaiʻi as well.

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Lilo, Stitch, Jumba, and Pleakley have finally caught all of Jumba's genetic experiments and found the one true place where each of them belongs. Stitch, Jumba and Pleakley are offered positions in the Galactic Alliance, turning them down so they can stay on Earth with Lilo, but Lilo realizes her alien friends have places where they belong – and it's finally time to say "aloha".

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