He had a younger brother who works as a civil engineer on the building of the London Crossrail, but he died in a works accident. Or was perhaps murdered by the Faceless Man. Miriam Stephanopoulos was part of the investigation. She suspected foul play, and was very certain that there wasn't anything supernatural at the crime scene. After the death of his brother Graham never visited the Quiet People again, since his brother was the one with the closest connection with them.