Doctor in the House S04E09 - Face the Music

Lady Molly Cornford's father has died. He was a generous benefactor to St. Swithins and Professor Loftus organizes a memorial service for him. When the organist gets knocked unconscious whilst playing golf with Duncan, Bingham is only too pleased to fill the breach. Duncan, Paul and Dick see this as sucking up to Loftus so they get Bingham paralytic by giving him spiked tomato juices. And so at the service he ends up playing 'Good Golly, Miss Molly' instead of hymn number 123.