Doctor in the House

That's My Uncle (4x23)

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When Professor Loftus goes on holiday, his replacement is Dick's uncle, Jeremy De Quincy, who is easy-going and initially seen as a breath of fresh air. However, eventually he gets on everybody's nerves as he is a lecherous scrounger, borrowing money from both patients and doctors. When Dick tells him he knows he is not qualified to be a chief surgeon, he leaves - but appoints Lawrence Bingham as his successor.