My cousin Paul went on that programme to get funding for his Generating Company, which does a Cirque du Soleil type act but smaller. I can't remember the figure but two investors agreed to give around £400,000 in return for a 40% stake in his company. Paul and his partner agreed immediately and that seemed to be that.
A year later I met him at a family wedding and asked him how the business was going with the injection of cash. "Oh" he replied, "We still haven't got the cash, we're still negotiating with them!"
Which goes to show what a huge gulf there is between what you see on TV and real life.