In other countries (I think in almost all other countries except Germany) we dont actually synchronize the movies, we just put subtitles. That means that you can learn english really easy if you want to. It is a very easy way of learning english and it makes fun. You dont believe how much your english will improve. If you are interested in medical terms I suggest you just download ER, Scrubs and of course House MD (dont forget that one) put first some english subtitles on it or just leave the subs out.
Aehm... I mean you buy the DVD. Of course you buy the DVDs. Other one is illegal, right? So you dont download, you buy the DVDs (pfiou...that was close).
Otherwise i think you just learn english medical terms by using them in England (or US or some english colony or anywhere). Why bother learning the whole words, if you are asked either way to do a "PET Scan or MRI, and if these dont show anything try a LB" .
(Edit): I checked your website and I have to say that 's a brilliant idea. Actual tape recording of interwievs... nice.