I think this show lost it in series 3 with the urine comment. A good surgeon doesn't make the same mistake twice. The Doc knew that with the bad breath comment at the end of series 1. The urine comment was totally unbelievable and a contrivance to move the plot along. Watch series 1 & 2 and the first 4 episodes of series 3 then turn it off just before the urine comment. The show goes downhill from there.
Now that this dreadful show is over I wish they would give Caroline Catz her own show, let her glam rocker personality cut loose. ( ya hear ITV )