Professor Brian Cox takes on the story of the force that sculpts the entire universe - gravity - in the third episode of his ground-breaking, award-winning, lip-smaking new series. Gravity seems so familiar, and yet it is one of the strangest and most surprising forces in the universe. Starting with a zero gravity flight above the flatlands of Florida, Brian experiences the feeling of total weightlessness and, as he floats around a plane that cancels out the effects of gravity on the body, he considers how much of an effect gravity has had on the shape and geology of the world around us. He also explains why the gravity of a neutron star is much stronger than that of Earth, and looks back through history to reveal why scientists' research into the power of attraction has given mankind a far greater understanding of the cosmos.