Nigel Henbest has been Astronomy Consultant to New Scientist magazine, Editor of the Journal of the British Astronomical Association, and Media Consultant to the Royal Greenwich Observatory. He is also a Future Astronaut with Virgin Galactic.
Katherine Higgins specialises in antiques and collectables. Current TV credits include appearing on the BBC's Antiques Roadshow, ITV's Christmas Show and the BBC's recent 20th Century Roadshow. Katherine writes for the national press and is also a columnist for Real Homes Magazine and Women and Home.
Mark Hill was a specialist for international auctioneers Bonhams and Sotheby's before becoming Director of an online antiques and collectables trading website, running its alliance with Ebay Live Auctions. He is an expert on the BBC Antiques Roadshow, and co-presents the BBC2 primetime series on antiques and interiors, 'Collectaholics'.