E.T. the Extra-Terrestrial (1982)

"He is afraid. He is totally alone. He is 3,000,000 light years from home."

An alien is left behind on Earth and saved by the 10-year-old Elliott who decides to keep him hidden in his home. While a task force hunts for the extra-terrestrial, Elliott, his brother, and his little sister Gertie form an emotional bond with their new friend, and try to help him find his way home.