Doctor in the House S04E02 - The Research Unit

Learning that he may receive a knighthood if St. Swithins can produce a medical breakthrough, Professor Loftus takes up Bingham's suggestion that they research plastic catheters but sacks him when he finds he has stolen the idea from a magazine and assigns Duncan to the research instead. Duncan can't quite get the experiment to work but when an irate Bingham blows the whistle on Collier making home brew in the lab and takes a journalist there, it's Bingham's attempt to sabotage the research that causes its success.