Tv For The Blind, Deaf

This is strange. I normally have the captions on my television, but they aren't appearing. The reasoning for that might be that, for some reason, there is a narrator on the episode (of Law And Order), presumably there for somebody who is blind or vision impaired to some extent. I guess the captions would be useless, but it's strange for them to be broadcasting this all of a sudden? I'm almost certain that the previous episode did not have this. And now that it is back from the commercial, they seem to be gone, though I can't pull the captions back up. Oh well.