Review of The Zygon Invasion
Warning: This review contains episode-specific spoilers and wild speculation about future episodes.
This is one of those stories in which misdirection is the order of the day, and which on subsequent viewings doesn’t necessarily become clearer. At least, not without the second half of the story, which is yet to come.
In other words, this is your fair warning that I have some oddball theories this week, so prepare to be inundated with my evidence. (Next week you can mock me mercilessly when I turn out to be completely wrong, but for now I’m going to pretend I’ve come up with the most brilliant fan theory of the series to date.)
Before I get into my speculative musings, though, let’s start with the more relatable mystery of which Osgood is which. Before the credits even roll, we see the surviving Osgood (who now wears question marks, whether on her lapels like the Fourth, Fifth, and Sixth Doctors each did, or on her replica of the Seventh Doctor’s vest) scrambling to escape capture. Hiding under the sheriff’s desk, she makes use of her inhaler. “Ah-ha!” we all crowed. “That’s the human Osgood! Zygon Osgood was the one Missy vaporized!”
Even the Doctor backed up our assumption, trying to help this Osgood come to grips with her identity. “Zygons need to keep the human original alive to refresh the body print. If you were a Zygon, you’d have changed back within days of your sister’s death.” But we’ve already seen these Zygons do something others have never done before: they can use mental images to take on a human form. (I’m kind of getting tired of Moffat’s finger in every goddamn pie, rearranging things to suit his own agenda. Yes, change is part of the show, and they have to keep things fresh. Still don’t like it.)