So, now Hydra has Deathlock and that spark guy. I think Deathlok will be sufficiently immune to compliance training at this point (though that is a big question mark). Sparky, though, may end up as a villain like Agent 33 pretty soon. If he's not already. He slipped about Reina a little too easily with Skye a few episodes back, and then he commented that "She is your mother, after all", or something like that, when that is supposed to be a super-secret just between Skye, her Mother, and Cal. How does he know? And if he is a good enough spy to figure things like that out, he should be good enough not to have those slips of the tongue. So, the slips are not slips but deliberate. Ergo, he seems villain-y to me. I bet he's already working with Hydra.
In fact, I suspect the whole group surrounding Skye's mother often do shady if not outright villainous things, including working with Hydra from time to time. I mean, come on. They just let Cal out and free? Really? That alone implies a criminal lack of concern and empathy. And the way Skye's mother treats Cal is disturbing. It could be written off as a woman who is still in love with a man who has become broken, but there seems to be a complete disregard for all the pain and suffering he has caused. Love him, treat him for his illness, yes. But don't just be all lovey-dovey to him and then set him free.
And then there is Bakshi. Who didn't see that coming?