Patrick is planning to spend the weekend in Brighton with Georgie - which means he will miss Anna's first night in 'The Sound of Music'. Nanny complicates things by leading Patrick's mother to believe he is going to visit her. Patrick cancels the visit to mother but uses her as an excuse whilst he heads for Brighton with Georgie. However a mix-up over suit-cases means that he ends up back in London for Anna's stage performance.
—don @ minifie-1