I've also been suggesting that these new characters-- and some old ones, like Garth-- will end up "manning" the batcave under the aegis of a revived Men of Letters. I love the idea.
This episode was another good standalone, although not quite as good as the others since the return from break. I liked the underground witches' speakeasy, and the look into this subculture of the witches-- apparently the bored, apathetic, rich ones-- was interesting.
Also we were gifted with another major hottie-- that's two weeks in a row.