Unlike some shows where the bad guys all have the same M.O., this one strives to venture into new, different lands. While having an episode plot based around "Who's really the bad guy," isn't shining and new in the idea department, it allows the SFX department to give us an episode we're not likely to forget.
I mean, I'd wet myself if a skinless woman fell through my ceiling and ripped a prostitutes' arm off, let alone forget it happened anytime soon.