And then Bates darkens episode's end with his creepy sign-off, "Nothing is over. And nothing is done with," to poor Mrs. Hughes...
Another great episode.
I agree. Bates should not have imposed a state of apprehension on Mrs. Hughes. He should instead have thanked her for restoring the happiness he'd thought was ended. If he intends to have revenge on his wife's attacker he should do so without such ominous fanfare. It isn't suited to his normally mature and sensible disposition.
But I'm left to wonder how this situation will turn out. If I were writing the script I would have that group including the rapist return to Downton for some reason, which prompts Mrs. Hughes to tell Carson what happened, and Carson would conspire with Bates and Branson to arrange some painfully fatal accident to befall the rapist while he's there.