In the climax of the film, Spider-Man (played by Tobey Maguire) confronts the villains Sandman (played by Thomas Haden Church) and Venom (played by Topher Grace) to save Mary Jane Watson (played by Kirsten Dunst) and bring peace to the city.
Throughout the movie, Peter Parker struggles with the dark influence of the symbiote, which enhances his aggression and amplifies his negative emotions. This leads to conflicts with his loved ones and drives a wedge between him and Mary Jane. Meanwhile, Flint Marko, the man who inadvertently killed Uncle Ben, becomes the Sandman after a scientific accident, seeking to provide for his sick daughter.
In the final moments of the film, Peter faces off against Sandman and Venom in a dramatic showdown in a construction site. With the help of Harry Osborn (played by James Franco), who dons his deceased father’s Green Goblin gear to aid his friend, Peter manages to overcome the villains.
During the battle, Sandman reveals that he didn’t intend to kill Uncle Ben, and Peter forgives him. Harry sacrifices himself to save Peter from Venom, and Peter finally rids himself of the symbiote by using a sound-based weapon.
In the end, Sandman is redeemed and dissipates into sand, and Venom is impaled by his own pumpkin bomb. Harry succumbs to his injuries but reconciles with Peter before dying. With the villains defeated and his friends safe, Peter reconciles with Mary Jane, and they reaffirm their love for each other.
As the film concludes, Peter throws the symbiote into a bell tower, where it is destroyed by the vibrations of the bells. Peter and Mary Jane attend Harry’s funeral, and Peter embraces his responsibilities as Spider-Man with a renewed sense of purpose and humility.
Through its action-packed climax and themes of redemption and forgiveness, “Spider-Man 3” delivers a satisfying conclusion to its story arc. As Peter Parker learns to overcome his inner demons and find forgiveness in his heart, viewers are left with a sense of closure and hope for the future.