Chris Tarrant hosts the first of two celebrity specials of the big-prize quiz, inviting a line-up of famous faces to have a go for charity _ with Ask the Audience, Phone a Friend and 50-50 available to them if they get stuck. Joan Collins and her husband Percy Gibson attempt to raise money for The Shooting Star Children's Hospice, while Stephen Fry teams up with Nigella Lawson in a bid to benefit the Terrence Higgins Trust and the Royal Marsden Hospital's Head and Neck Cancer Research Trust