The episode starts with a reminder that “The Gobblers” are kidnapping children—and keeping them in nets, cages and locked rooms—and have been discreet, until the Gyptians started to track their movements. Meanwhile, Mrs. Coulter abuses her connections with the Magisterium in order to find Lyra. And, it’s obvious that while Mrs. Coulter wants Lyra back, she’s doing it in a way which presents her in a way everyone can see why Lyra ran away from her in the first place.
Lyra Belaqua is rescued and taken into the care by the Gyptians. They have connections to Lord Asriel and are planning to rescue the missing children—as soon as they discover where they are being kept. It is during her stay with them that Lyra learns more about her origins and the alethiometer. Her reaction to the truth about her parents is believable and appropriate. Mrs. Coulter’s reaction to Lyra running away from her is not. Even the Magisterium is horrified by what Mrs. Coulter does in order to find her. It seems that it’s not only the alethiometer that the Magisterium has aversions against.
The Gyptians are willing to do more to figure out what’s going on with the missing children than the authorities. They have a plan—and allies—waiting to be carried out. Two of the Gyptians decide that having concrete evidence is better than traveling on gossip, so they continue their investigation against orders. At this point, it’s clear that the Magisterium is involved, but as to the how and the why, viewers will have to wait and see.
In our world, Lord Carlo Boreal—the man who works with the Magisterium—continues his search into the identity and the mystery of Dr. Stanislaus Grumman and whether or not he managed to “crossover” from one world to another, a theory Lord Asriel insists is the truth. The results his informer uncovers is interesting and shocking. This scene is essential to the plot of the story because it delves more into the idea of “other worlds” and why it remains a mystery to everyone. Book readers will know exactly what I’m getting at, but that’s all I’ll say, for now.
The Spies is the episode in which the plots in London wrap up and the story and the characters travel to the North to rescue the children and to learn why they were taken in the first place. This is the shift in the story in which the audience—both readers and viewers—have been waiting for since the cast was announced. This episode reiterates the dangers Lyra has been shielded from her entire life, but with her recently acquired knowledge, she knows she cannot return to Jordan College without Roger.