Did a Chilean family photograph a real UFO flying above theAndes Mountains? Is footage of a tall, dark-colored, hairycreature walking through the woods proof the legendary OhioGrassman exists? Does a huge, 5,000-year-old horn discoveredon a beach in England belong to a prehistoric creature thatstill lives? Scientists and citizens attempt to decipher themysterious inscription of a sword found in River Witham,Lincolnshire. Tony Harris and his team of experts examine theclues and make a determination about the validity of what we'reseeing.