So here's where we are: Late last season, Ashley was kidnapped by the Cabal, who want to control all the Abnormals, and they've been running weeks of experiments on her, activating her latent Abnormal DNA, then grafting in new DNA from this Source Blood that happens to be the reason why Jack the Ripper and Helen Magnus don't age and haven't died. And she's the pilot of a program to make more like her: mindless soldiers with healing and retractile claws and unstoppable strength, and I'm assuming maybe some other powers. (Ash has teleportation from her father, but the other five were scrubbed clean of all abnormalities when they were children, so they could be grafted, theoretically, with any power they wanted to give them)
The goal is to take down the entire Sanctuary network.
Oooh, big! I was scared that it might still be slow and dull like the first season's beginning, but apparently I should have held out. Now I'll be watching this (because I don't have enough to watch already!), and I'll eventually go back and catch up.