The new series opens as Optimus, Cheetor, Black Arachnia and Rattrap discover themselves suddenly back on the Transformer homeworld of Cybertron - with no memory of how they got there. Instead of a hero's welcome for winning the Beast Wars, our heroes are hunted by a mysterious new breed of Transformers - the Vehicons. These vicious machines enforce the will of Megatron, who has returned with a ...