John and Stephen both share strange dreams of Peter, the Time Guardian, running through a forest, and showing them a vase. The two of them look through thousands of pictures of vases, eventually finding Peter�s, which is owned by Professor Cawston, and looked after by Professor Garner. Stephen tricks Professor Gamer into bringing the vase to him. He grabs its lid, and jaunts back to the Lab with it. The lid has strange markings which are designs for a Neutron Interton. The Tomorrow People build the device: a small disc. Nothing happens when Chris and Elizabeth pick it up, but when Stephen picks it up he disappears. (thetvdb.com)