Mandy, Helen, Steele, Norman, Trevor and Dilys go to Crabscuttle cove on the bus. Trevor uses a navigation system that leads them the wrong way to the beach. They get stuck in wet sand! A tide comes in which submerges the bus in the sea. Tom airlifts everyone from the top of the bus to safety in his helicopter. Trevor admits that technology can go wrong and should not be relied upon completely.Mandy, Helen, Steele, Norman, Trevor and Dilys go to Crabscuttle cove on the bus. Trevor uses a navigation system that leads them the wrong way to the beach. They get stuck in wet sand! A tide comes in which submerges the bus in the sea. Tom airlifts everyone from the top of the bus to safety in his helicopter. Trevor admits that technology can go wrong and should not be relied upon completely.