Planet 51

In the quaint town of Glipforg on Planet 51, a world where little green aliens live in harmony with their surroundings, reminiscent of 1950s USA, Lem (Justin Long) is a teenage alien who has just landed his dream job at the local planetarium museum. His family and friends are ecstatic about this milestone, particularly his best friend Skiff (Seann William Scott), a geeky alien teen who runs the local comic book store and has a fascination with the "Humaniacs" film franchise.

As Lem returns home from work, he seeks advice from his neighbor and friend Eckle (Freddie Benedict) regarding Neera (Jessica Biel), his long-standing crush. Meanwhile, Lem's family is hosting a barbecue, where Neera happens to be in attendance. However, Lem's attempts to ask her out are constantly interrupted by Glar (Alan Marriott), Neera's free-spirited friend.

Just as the evening is getting underway, a mysterious spacecraft appears on the planet's radar, emitting a flashing red signal that sends shockwaves throughout the community. Unbeknownst to the inhabitants of Planet 51, this signals the arrival of an extraordinary artifact from Earth – a wheeled probe with artificial intelligence, code-named "Rover." Rover breaks free from its confinement in the hidden army base, codenamed "Base 9," and sets out on a mission to locate the astronaut, while simultaneously collecting planetary rocks as part of its secondary objective. The army soon becomes suspicious of Rover's escape and launches an investigation into its activities.

Meanwhile, in Lem's backyard, a NASA spacecraft, eerily reminiscent of the lunar module, lands unexpectedly, sending Chuck Baker (Dwayne Johnson), the fearless astronaut, into a state of utter bewilderment as he plants the U.S. flag. The sudden appearance of an alien "rubber ducky" on his path only adds to his confusion. As the townsfolk gather around, stunned by the revelation that they are not alone in the universe, Chuck attempts to retreat back to his spacecraft – but Eckle's insatiable desire for an autograph proves to be a significant obstacle.

The army soon arrives on the scene, with General Grawl (Gary Oldman) at the helm, seeking counsel from Professor Kipple (John Cleese), an expert in intelligence regarding the "alien invader." As tensions rise, the area is quarantined, and a local civil defense force is established to protect its citizens from the perceived threat of alien invasion.

As Lem (actor name) stumbles upon Chuck hiding at the planetarium, the two form an unexpected bond as they discover a shared language. Lem's initial wariness gives way to compassion, and he decides to take a risk by protecting Chuck from the authorities, even sacrificing his job in the process. The unlikely duo's relationship deepens when Lem offers Chuck refuge in his home for the night, unaware that Rover is hot on their trail.

As the trio navigates the chaos of their situation, Chuck confides in Lem about his lack of "right stuff" and reveals that it was Lem who possessed the bravery and selflessness to take a stand for him. Chuck also shares with Lem the vast expanse of the universe, illuminating the star that Earth orbits and expanding Lem's understanding of the cosmos.

However, their newfound camaraderie is short-lived as the army arrives to transport Chuck's module to a secret location, shrouded in mystery even to the media. With Chuck's fate hanging in the balance, Lem and Skiff (actor name) must conjure up a plan to reunite him with his spacecraft.

Inspiration strikes when they visit a comic book store, leading them to devise a daring scheme for the next night's premiere of "Humaniacs." Disguising themselves as fans, Chuck, Lem, and Skiff infiltrate the event, with Chuck participating in a costume contest that showcases his musical talents. The evening takes an unexpected turn when Rover appears on the scene, sending the alien-costumed attendees into a panic.

As soldiers begin to unmask the costumed fans, General Grawl (actor name) and Professor Kipple arrive at the scene, their suspicions confirmed when they spot Chuck's distinctive United States Flag insignia. The evening descends into chaos as the authorities close in on their quarry, leaving Lem, Skiff, and Chuck fighting for their freedom and a chance to reunite with Chuck's spacecraft.

As Chuck's unmasked visage is laid bare for all to see, Lem attempts to intervene on behalf of their friend, only to be branded a zombie by General Grawl. Professor Kipple, meanwhile, declares his intention to dissect both Lem and Chuck's minds, prompting Chuck to feign releasing Lem from his supposed control. The crowd swallows the ruse hook, line, and sinker, as both Chuck and Rover are whisked away in armored vehicles, with Lem hailed as a hero for his supposed liberation.

Back at Base 9, General Grawl subjects Chuck to a grilling, warning that any attempt by Chuck to manipulate the minds of the soldiers present would trigger a catastrophic chain reaction, resulting in a hail of bullets and potentially electrocution. Chuck inadvertently activates this very phenomenon, but remains impervious to its effects. The general misinterprets this as resistance, clearing the way for Professor Kipple's ill-fated attempt to dissect Chuck's brain.

As Lem rediscovers his footing at the planetarium, he is thrust into the spotlight via television appearances, yet his sense of triumph is tempered by pangs of guilt over Chuck's plight. Seizing the opportunity to do what is right, Lem hotwires a vehicle and finds himself confronted by Neera, who is impressed by his actions. As they plot their rescue mission, Skiff, Eckle, and Neera join forces with Lem, driven by a shared desire to free their friend from captivity.

However, the quartet soon realizes that their efforts are stymied by a critical lack of information regarding Chuck's whereabouts, as well as the absence of Rover, who had also fallen into military hands. Fortune smiles upon them when the resourceful robot suddenly materializes on the outskirts of town, having secretly liberated himself from his armored prison.

Rover is tasked with serving as a canine-style tracker, sniffing out Chuck's trail and leading their group to an abandoned gas station in the midst of the desert wilderness. As they explore this dusty outpost, Skiff's curiosity gets the better of him, prompting him to investigate an old refrigerator that yields an unexpected surprise: a vintage Coca-Cola bottle that, upon closer inspection, is revealed to be a cleverly concealed trigger mechanism.

With this discovery, Lem devises a plan to divert attention away from their true intentions. Glar and his protest group create a diversion at the base's perimeter, allowing the rest of the group to slip in unnoticed. As they infiltrate Base 9, the stage is set for a daring rescue operation that will put their skills, ingenuity, and camaraderie to the ultimate test.

As the sinister Professor Kipple prepared to extract Chuck's brain in a laboratory, Lem and his cohorts burst in through the ceiling, employing their trusty canine companion Rover to disperse the scientists, technicians, and guards. The sudden intrusion triggered a cacophony of alarms as they freed Chuck from his restraints. With the module containing Chuck's lunar vessel located in a nearby hangar, General Grawl emerged to block their path, warning that any attempt by the "alien" to depart would result in the entire structure being obliterated. Moreover, he revealed that the area was meticulously rigged with explosives.

In an effort to reason with the general, Lem cleverly employed a diversionary tactic, which inadvertently set off the bombs and created chaos as soldiers scrambled to flee the inferno. Amidst the falling debris, General Grawl found himself knocked unconscious. As the module's occupants - comprising Lem, Neera, Eckle, Skiff, and Rover - boarded the vessel, Chuck hesitated to abandon General Grawl to his fate and instead rushed to rescue him from the flames.

To escape the burgeoning firestorm, Chuck skillfully piloted the module into orbit around the planet, allowing the alien youngsters to experience the thrill of weightlessness. As Kiff, Eckle, and Rover reveled in the joy of zero gravity, General Grawl began to grasp that Chuck was a benevolent being who had not succumbed to an otherworldly transformation. Lem finally found the opportunity to ask Neera out on a date as the group basked in the tranquility of space.

Chuck navigated the module back to the planet's surface, where the army awaited with hostile intentions. However, General Grawl intervened, ordering his troops to stand down and vouching for Chuck's innocence. As the dust settled, the inhabitants of Planet 51 finally comprehended that Chuck had never intended harm. In a poignant moment, Chuck allowed Rover to remain behind, adopting Skiff as its new caretaker before bidding farewell to the alien population.

Post-credits, Professor Kipple, who had miraculously survived the explosion, confronted the two soldiers who had initially crossed paths with Chuck and Rover, exacting revenge upon them. As Chuck departed Planet 51 peacefully, Rover slipped onto his spaceship, ultimately becoming an integral part of Chuck's life as a beloved pet.