"Beneath" lays off on the plot-heavy aspect of the show and allows the characters to be themselves. This leads to one of the most tightly woven episodes so far. It pulls together Henry's death, the theft of Jane's crystal, and the various feelings that have been floating around as Cassie kisses Jake twice.
Faye has been the most exciting character (though the other characters are pretty boring so it's not a huge complement) and she gets more emotional content this week, reminded of her childhood by the girl running around in the darkness. Like in her more playful scenes, Faye expresses more than the other characters and breaks down over the girl--before seeing her grandfather dead.
As far as the overall mystery goes, all the factions are in the same place but missing each other. It's kind of funny, actually. Each faction knows specifically about only one of the other factions. Jake being ordered to kill Cassie should shake things up. My guess is that he'll become a good guy and spill the beans, but the writers could kill off another character.