'Salem's Lot
After fleeing 'Salem's Lot, Callahan arrives in New York City, and becomes a vagrant. Now able to sense vampires, he realizes that they live and hunt all around him. His alcoholism gets worse but after he starts working at a homeless shelter, he begins to recover. He befriends several people, such as Rowan Magruder and Lupe Delgado. Callahan develops a deep fondness for Lupe, and later admits to having fallen in love with him. He wonders if this means he is gay, but despite a brief kiss on the cheek, nothing physical occurs between them.