Lost Boys is the tenth episode of twelve episodes in Season Four and the Forthy-sixth episode in the DEXTER television series. The episode aired on November 26, 2009. In this episode, Dexter chases Arthur to a video arcade and finds that he kidnapped a 10-year old boy. Dexter tries to follow him, but missed, so he has a mission to find this "Lost Boy" before it's too late. Arthur is planning to kill him.