On Christmas Eve 1975, former Spitfire pilot Peter Gibbs took off from the unlit airfield on the Isle of Mull and never returned. It was a moonless night and having just finished dinner with his girlfriend at the Glenforsa Hotel, it seemed a bizarre and impetuous act. Then Gibbs' body was discovered on a hillside, but the plane was nowhere to be seen and the story began to get stranger. Punt heads to the Mull to investigate, but with every piece of evidence the mystery deepens. Was Gibbs attempting an illicit flight to Northern Ireland, was he trying to fake his own death, or was it something in creepy Room 14 that was to blame? As he tries to disentangle myth from reality, Punt hears fishy tales from a suspicious local diver, unearths the original pathologist and scrutinises the man who watched Gibbs vanish into the night. Producer: Sarah Bowen.