Doug is a Glader whose name was seen engraved on the wall of the Glade in the Maze Runner film. His name was not crossed out at the time, therefore he was alive when Thomas arrived. He maybe a reference to Douglas C., the art Director of the movie. He is confirmed dead as his name was on the memorial rock at the Safe Haven, he most likely died during the Griever attack or by WICKED. He does not appear in the books.