A light-hearted look back at favourite moments from the past 15 years of the business challenge, beginning by remembering some of the most unforgettable candidates. These were the sharp-suited entrepreneurs that made Apprentice fans laugh, cry and cringe with their unfailing self-belief. For them, 100 per cent was never enough. But when they had to prove their skills within the tasks, most were not up to it - and soon the firings began