Horizon takes seven people who are some of the highest flyers in their field - a musical prodigy, a quantum physicist, an artist, a dramatist, an RAF fighter pilot, a chess grandmaster and a Wall Street trader. Each is put through a series of tests to discover who is the most intelligent? The principle way that we measure intelligence, the IQ test, remains popular and convenient. Yet most psychologists agree that it only tells half the story. This program advocates a different approach, creating an array of unusual challenges to assess brainpower and positing an argument for the interplay of multiple intelligences. Assisted by the insights of Harvards Howard Gardner and experts using brain scanning technology at UC Davis M.I.N.D. Institute, the program brings together a group of obviously bright and talented people and presents them with trials of all shapes and sizes. The results establish the validity of measuring not just what people know but also the equally important ways in which they exercise their practical, creative, emotional, and kinesthetic IQs.