mind puts together the clues he has witnessed and he realises the truth. He and Kamelion rescue Turlough from the airless Draco just in time, but when Turlough tells the Doctor his story, the Doctor is forced to inform him that the so-called Phiadorans were Vrall all along. The TARDIS should have translated Lytalia's language for them when they first met, just as it did for the warden—and if the Phiadorans really acquired their knowledge of English from Turlough then they should have spoken in a 20th-century vernacular, instead of referring to the warden's robots as “mechanical servants”. Lytalia in fact acquired her knowledge of the English language by eating Granby's brains, and passed it on to the rest of her people via encoded neurochemical packets. The Vrall must have used the vacuum gun the expedition found earlier to fire RNA spores encoded with the instructions for the impeller drive into space, hoping that they would reach a receptive mind on Earth and inspire an expedition to the Moon. The British were lured to the Moon deliberately, and are now taking the Vrall to a new feeding ground... Richard has been forced to take off without the Doctor once he is certain that nothing can survive in the airless crater. On his way back to Earth he sends word of their guests via heliograph, and before landing he proposes to Emily, who promises to consider his proposal if he honestly accepts her and her gender as true equals. The two surviving ships land back at Glen Marg, where Queen Victoria herself is waiting to greet her distinguished visitors... but upon emerging from the ships, the Vrall shed their outer skins and fall upon the horrified officers. The queen is saved by the quick reactions of her attendant John Brown, and she and the surviving officers barricade themselves in the mess hall as the Vrall feast outside. By the time the TARDIS arrives, the Vrall have begun to reproduce by cellular division, and it is clear that there is no hope of containing them. The Doctor therefore returns to the citadel on the Moon to collect the weapons which the hunters would have used against the Vrall, and he finds what he needs and escapes moments before the citadel finally self-destructs, leaving only an unusually deep crater. The Doctor, Turlough and Kamelion then return to Earth, and use their weapons to