@edgarblythe,
I watch almost all television shows these days with the caption feature on. It detracts from the viewing a bit, but I always have the option of re-running the show to get a second look at the action. In any case, I find I often can ignore the captions and watch the action...but the words being there seem to subliminally allow me to understand stuff that might otherwise pass me by.
Nancy was a big Harry Potter movie fan...and the dialogue in those movies were almost incomprehensible without the captions.
Elementary is undoubtedly my favorite network (non-premium) show...by far!
As a young man I spent two years of my life in England and managed to build a life-long ability to follow staccato British delivery. My diminishing hearing has put a bit of a crimp in that.