PB3 finds that helping isn t always as easy as it seems and it s important to think before you act PB3 and his robot Robin are with their Earth friends Ben and Sue finding out about life at the beach. Suddenly the evil OOs arrive in their spaceship and try to catch them. In their hurry to escape the two ETs e into the water and discover another world under the sea. In their attempt to help some grey fish they put them in great danger. Ben and Sue help them to understand but can they put the situation right again Syllabus Grammar and structures - present simple present progressive have got for possessions verb infinitive conjunctions and but prepositions of place can can t there s there are Expressions - It s more difficult than it looks It s better It s time for... I ve got an idea Ooops Oh dear Goodbye come again soon