Big Brother was only the start of it, now we have a game show set in the back of a taxi cab and a reality TV show in which we watch people, watching TV. Big TV formats are big business, worth billions each year to the industry. But what's the secret to finding a winning formula, preventing others from copying it and to selling it worldwide? We talk to a group of industry leaders for the inside track; Charlie Parsons Chief Executive of Castaway Television Productions, Louise Pedersen of ALL3MEDIA and Ricardo Periera from TV Globo. They share their wealth of knowledge on how to make and sell the programmes we love to watch.