We learned the true identity of Ms. Blake, how she knows Derek and why the hell she's a Darach. It's not a pretty story, and it's difficult to know how much to believe.
Let's get to it!
Cora is still a pretty worthless character, doing nothing more than gathering too many people at the hospital, which was extremely vulnerable during a dangerous storm. The best part about setting the hour at the hospital was the use of Melissa. Her reaction to seeing Peter was fun and her ass-kicking of the twin in its combined form was pure mama McCall goodness.
Peter teaming up with Scott was also very hot, as he looked the part in a V-neck sweater, something I wouldn't ordinarily suggest a man keep in his closet. Peter, he can do as he pleases.
The Argents and Isaac were called in as reinforcements and while all of this was happening around them, we finally learned the identity of Jennifer Blake: Jennifer was once named Julia, and she was Kali's emissary. Killing her was Kali's mission to join the alpha pack with Deucalion. She didn't do her job, however, and when she heard her breathing, decided to let her die a peaceful death rather than take her out.
Nice try, Kali, but after being slashed so badly by your poor pedicure, suffering in the smoldering sunlight and being drained of blood was hardly a peaceful death. If there was some lame attempt to make Kali seem somewhat sympathetic in her near-miss killing of her emissary Julia, it didn't work.
What did work was how I came way from the story of Julia-turned-Jennifer feeling a bit more for her plight. We also learned her tie to Derek. At the same time she was suffering in the dirt, Derek was sacrificing his innocent love, Paige. Her blood was just enough to light the fire in the Nemeton (it IS in the basement of the Hale house, coincidentally, isn't it?) that was then enough to keep her alive until she was found by Sheriff Stilinski. From there she was saved, somehow found a new face and adopted a new identity... made an oath to kill the alphas and returned to Beacon Hills.
It has certainly taken her plan a while to come to fruition. You have to wonder how much of what she tells Derek is true, but on the other hand, she owes her life to him. There is method to her madness in making him her lover, and wanting to get close.
By the end of the hour, Stiles figured out what guardians she is after and rushed to warn Scott. What I love so much about Stiles is that he would choose Scott over both his father and Scott's mother. Together with his best friend, he feels invincible. Without Scott by his side, a part of himself is missing. As much as he loves his dad, he knows that with Scott he can come up with a way to save their parents. Without him, he must rely on others who don't share what they do.
Scott's head wasn't in the game. He walked off with Deucalion. He has no idea what is wanted of him, or whether Deucalion has his parents. He hasn't been in on the conversations with Derek and Julia.
I was a little lost at the end as to whether Deucalion truly knew where their parents were being held or not. Stiles is going to have to rely heavily upon his second team of Derek, Peter, Isaac, Allison, Mr. Argent and Lydia (if she's up for it) to get Scott back and save him and their parents. I don't doubt Stiles can do it, but I know he'd be more confident with his friend by his side.