In the final showdown, John Smith (Number Four) and his friends, including Sarah and Sam, confront the Mogadorians in a battle to protect themselves and prevent the aliens from carrying out their destructive plans. Number Six, another Lorien survivor with exceptional combat skills, joins the fight to aid John.
The climax takes place at the high school during a homecoming dance, turning the seemingly ordinary event into a chaotic battleground. The Mogadorians, led by Commander and Number Six’s former ally, are relentless in their pursuit of John.
During the intense battle, Henri sacrifices himself to protect John. This loss serves as a turning point for John, fueling his determination to stand against the Mogadorians.
Number Six unleashes her powerful abilities, showcasing her strength and agility in combat. The battle escalates, with John tapping into his newfound powers and fighting alongside his friends to defeat the Mogadorians.
The resolution sees the defeat of the Mogadorians at the hands of John, Number Six, and their allies. The surviving Lorien survivors regroup, discovering a hidden spaceship buried beneath the ground. Inside the spaceship, they find important information about their past, their purpose on Earth, and the ongoing threat they face.
The film concludes with the survivors preparing for the next phase of their mission, hinting at potential sequels and further confrontations with the Mogadorians. Overall, the ending sets the stage for the larger intergalactic conflict between the Lorien and the Mogadorians, leaving room for additional developments in the storyline.