Davey Morgan
From Tardis Wiki, the free Doctor Who reference
Davey Morgan was an elderly man who lived in the main city centre of Cardiff who was commonly despised by children who laughed at him. He was ex-soldier from World War II, who often remembered the terrifying events.
During a stormy night, he had a terrifying dream about meeting an alien at the front door after answering some heavy taps. He woke up to discover that the exact same taps were ocurring in the real world. Heading downstairs, he discovered it was merely his back door, which he hadn't closed properly the night before. (TWN: Border Princes