Overview
Martian Child is a 2007 American comedy-drama film directed by Menno Meyjes and based on David Gerrold's 1994 novelette (not the expanded 2002 novel) of the same name. The film stars John Cusack as a writer who adopts a strange young boy (Bobby Coleman) who believes himself to be from Mars. The film was theatrically released on November 2, 2007, by New Line Cinema.
Plot
David Gordon, a popular science fiction author, widowed two years prior as they were trying to adopt a child, is finally matched with a young boy, Dennis. Initially hesitant to adopt alone, he is drawn to him, seeing aspects of himself in him.
Believing he is from Mars, Dennis protects himself from the sun's harmful rays, wears weights to counter Earth's weak gravity, eats only Lucky Charms, and hangs upside down to facilitate circulation. He refers often to his mission to study Earth and its people, taking pictures, taking things to catalog, and spending time consulting an ambiguous toy-like device with flashing lights that produces seemingly unintelligible words.
Once David decides to adopt Dennis, he spends time getting to know him, patiently coaxing him out of the large cardboard box he hides in. Soon, David is cleared to take Dennis home and meet David's dog, "Somewhere." In Dennis's bedroom is a projector of the solar system that he pronounces inaccurate. With the help of his friend Harlee and sister Liz, David tries to help Dennis overcome his delusion by both indulging it and encouraging him to act like everyone else. Dennis attends school but is quickly expelled for repeatedly 'stealing' items for his collection. Frustrated, David tells Liz that perhaps Dennis is from Mars.
From Wikipedia (CC BY-SA 4.0).