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A look back over the highs and lows experienced by the hundreds of entrepreneurs who have entered the Den over the last nine series, examining the key ingredients required for a successful pitch.
Heated
Wallace & Gromit's World of Invention
Help! I Bought It at Auction with Sarah Beeny
Modern Marvels
The Secret Life of Machines
Faster! Humanity's Quest to Save Time
The Genius of Invention
David Jason's Great British Inventions
James May's 20th Century
The Big Life Fix
The Game Plan with Shaquille O'Neal
RISING
Histoire des Inventions
History's Greatest Machines with Dolph Lundgren
Japan's Top Inventions
Inventions That Shook the World
The Mega-Brands That Built America
Ancient Inventions
