E.T. The Extra-Terrestrial (1982)

An extra-terrestrial is accidentally left behind on Earth by his ship and befriends a young boy, as well as his brother and sister. As the children attempt to help their new friend contact his home planet, so that he might be rescued, they must simultaneously elude scientists and government agents who are determined to apprehend the alien for their own purposes. In their quest to see E.T. return home, the children enjoy the greatest adventure of their young lives.