Watcher Callahan was worgen male who served as a Night Watcher. He became a worgen after he was infected by the cure. He was later cured by the worgen infection, and continued his duty as a Night Watcher. When the Ghouls started to invade Darkshire, Watcher Callahan was seen defending the town, and killing a number of Ghouls that were entering the hall. The Ghouls were defeated, and Darkshire was safe for now.