The story of the 'dead' canoeist who turned up unharmed the other day, five years after he was declared dead, has gripped the nation. Well, gripped might be a bit strong, but it's certainly had a place in the column inches of the tabloids. To recap, he wandered into a police station this month and said he thought he might be a missing person, but he had no recollection of the past five years. Where had he been? What had happened to him? Well, police forces across the world got involved, using all their cunning and experience to try and solve the mystery.