The freeloading sister has a boring subplot. The main plot isn't that great either as Olivia and co hunt down a syphilis infected, spinal fluid drinking vampire created by ZFT which is funded by William Bell. This was dull and full of questions: why didn't they restrain the 'vampire'? The 'vampire' may be cured, but isn't she still a murderer?
"Someone chewed his spine out?"
"I can just about remember when a suspect being human was a given not an option."