Following the Devil’s End incident, the Brigadier is contacted by Major Carver, the father of a young private who was vapourised by the gargoyle Bok. Carver demands to know why his son’s body was never recovered, and, sympathising with his grief, the Brigadier allows Carver to accompany him to UNIT for a talk. There, Carver holds him and the Third Doctor hostage with primed grenades sewn into his jacket, and demands the truth — but even if the Brigadier thought Carver would believe the truth, the Official Secrets Act prevents him from revealing it.