Buster is convinced that he has seen real UFOs and he uses Muffy's fancy new telescope to get the proof. What he discovers is much more terrifying - a comet hurtling directly towards Earth! Can buster convince his friends that this sighting is real in time for them to save the planet?

Mr Sipple from next door is moving away and Arthur wonders who the new neighbours will be. When Alberto Molina and his family settle in, Arthur makes a new friend and learns about a different culture. Show less