movie about boy inside him leaves another soul and he fighting

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.

A teenage girl is captured by a giant mutated squid-like creature that appears from Seoul's Han River after toxic waste was dumped in it, prompting her family into a frantic search for her.

A young boy stays with his aunt and uncle, and befriends his cousin who's the same age. But his cousin begins showing increasing signs of psychotic behavior.

The unbelievable story of 22 year old Or, who secretly finances his sex change operation in Thailand by lying to his conservative parents and then returns home as a woman to face her new life, her family and the cost of living her dream

200 years after his shocking creation, Dr. Frankenstein's creature, Adam, still walks the earth. But when he finds himself in the middle of a war over the fate of humanity, Adam discovers he holds the key that could destroy humankind.

All unemployed, Ki-taek's family takes peculiar interest in the wealthy and glamorous Parks for their livelihood until they get entangled in an unexpected incident.

Paul Dean has created a deadly parasite that is now attached to his stomach. He and his female companion, Patricia Welles, must find a way to destroy it while also trying to avoid Ricus & his rednecks, and an evil government agent named Merchant.

World War II soldier-turned-U.S. Marshal Teddy Daniels investigates the disappearance of a patient from a hospital for the criminally insane, but his efforts are compromised by troubling visions and a mysterious doctor.

This thoughtful, often fascinating featurette focuses on the psychiatric aspects of "Shutter Island" and how consultant James Gilligan counseled the actors so they could better understand their reactions and motivations. We also learn about the controversial yet prevalent practice of lobotomizing violent mental patients and how the more humane approach of pharma-psychology gradually replaced it around the time period in which the story takes place.

A boy's love of action movies becomes his only outlet after facing a far more difficult battle.