Doctor in the House S09E11 - The Sydney Surprise

Dick and Duncan urge Professor Beaumont to have a day off, but Dick leaves Duncan in the lurch when he joins a friend on his boat, The Sydney Surprise. Duncan goes to find him but Griffin rings Professor Beaumont and sends him to the boat on a supposed emergency. The two doctors are found out - but so is the professor when a rich widow also on board turns out to be his bit on the side.