Yes, actually, I suppose when I said 5 a year, I meant 5 whole episodes from start to finish. What I do quite a lot is watch bits of episodes, for precisely the reasons Laura gives. Sometimes I leave the video running silently while I'm writing, as inspiration/reality check/characterisation prompt. I might watch a selection of episode chunks if I'm writing in a particular time frame that's relevant. Usually, I gloss over the villains and A plot stuff, unless there's a lot of L&C in there.
Yvonne