Male. Mid-twenties. Previously academic. Socially awkward but extremely talkative. Somewhat distant from his mother. Father missing. Thinks too much about the past. Favourite TV shows include Dexter and Lost.
Female. Mid-twenties. Andy's girlfriend. Social butterfly. Two bothers, one sister. Close to mother, father often working. Wants to have children and travel the world. Constantly thinking about the future. Favourite TV shows include The Walking Dead and Game of Thrones.
Male. Late fifties. Retired Detective. Expert on the disappearance of Andy's father. Few friends. His wife has divorced him and his son lives in Australia. He seems to have nowhere to be, but speaks with great urgency. He hardly watches TV, but sometimes listens to Radio 4. Reads The Telegraph from time to time. UKIP supporter. Could be a character from a Harold Pinter play.