If there are no credence to the claims of life beyond earth, why did Winston Churchill ask for information on flying saucers? How can you explain a UFO seen by hundreds that has been captured on video? Bradley Walsh is heading Out of This World in a new series exploring some of the greatest mysteries on – and beyond – our planet. With his trademark humour, curiosity and willingness to ask the questions the rest of us are thinking, Bradley travels across Britain, Europe and America in search of answers to one enormous question: are we really alone? From UFOs and USOs to Atlantis, Stonehenge and crop circles, Bradley approaches the unexplained with an open mind, a healthy dose of scepticism and plenty of laughs.