Caught it on DVR. This is the sort of episode that shows what people really
think of morally ambiguous endings. Namely, they don't like them.
It was a nice touch that Our Heroes not only couldn't succeed in protecting the sisters but couldn't even be certain that they were reformed. Ashley was toned down a little and seemed more attractive a character. I suppose the general blah feeling some got was due to there not really much Noble Heroes Tragically (But Really Coolly) KICKING ASS because, well, shit happens and a man's gotta do what a man's gotta do.
Etc. etc. ad nauseam.
Fringe, which also has totally deranged "science," should take a pointer from this show---the broken suspension bridge to nowhere is exactly the kind of over the top nonsense needed. Dull and humdrum does not make up for stupid. Completely insane makes up for stupid. Call it the Farscape principle.