Tegan's rebellion against Monarch's regime and her struggle to seize control of the TARDIS to escape and warn Earth

Tegan returns from hiding intent on reaching the TARDIS, warning Adric that Monarch intends to destroy Earth. Adric dismisses her panic, insisting the Urbankans mean no harm and praising Monarch …

Monarch’s forces act at the last possible moment, blocking the Doctor and Bigon just as their fragile hope of escape begins. Hoplites seize both men in front of Nyssa and …