Sara goes away overnight to visit her sister Vicky and Pat and Julian have to cope on their own. Pat forgets his keys to the house, picks up the wrong sandwiches for lunch and creates chaos trying to make pancakes for supper.Mrs Goggins discovers that a hedgehog is stealing Bonnie's food. Pat and Amy take the hedgehog out into the countryside and set it free. The next morning Pat and Julian stop in at the Post Office and Julian discovers that the hedgehog has returned overnight with her babies.All by themselves together, Pat and Julian build a special little house for the hedgehogs to live in, just before Sara returns home.