"We will die in the fire instead of living in chains." For years, 20 million shape-changing Zygons have lived among us in secret. They wear human form, hiding in plain sight. Now a fanatical Zygon splinter group seek to expose their own kind and provoke a conflict that will force both sides to the brink of Armageddon to ensure their own survival. It took three Doctors to broker a fragile peace between Zygons and Humans. Now the 12th...