Where do we go from here? Thats a hard question to answer as there was very little to indicate where this story is taking us. Whatever happens its most likely Bonnie will be driving the action and Osgood will be the key to the resolution in whatever form it takes. This was such a good setup that its almost hard to imagine the payoff being good enough to meet such high expectations. The last episode written by Peter Harness, Kill the Moon, ended with the moon hatching into a dragon that literally laid an egg. Lets hope this story gives him enough time to come up with something that is less silly and pointless and more in keeping with the current episodes promising premise. The Zygon Invasion is another strong addition to the wealth of great episodes that make up series nine so far. While Peter Capaldis Doctor is kept mostly on the sidelines for this story his presence is always felt and he lights up the screen in every scene hes in. Jenna Coleman is absolutely perfect as both Clara and Bonnie, effortlessly switching from loyal friend to cunning enemy. The guest actors all held their own within a large cast and there was not a moment when it was easy to take your eyes off the action. If this is any indication of the quality of the sequel then The Zygon Inversion is going to turn each and every one of us completely inside out.