(She sits up in shock.) (To BARBARA.) And hurts!! BARBARA enters and sits on the end of the second bed. In the thin atmosphere of the planet, their voices have a slight echo.) One of the ants chirrups to the grub creature. VICKI: Ian, Barbara, what is it? VORTIS
(The DOCTOR and IAN discuss the continuing sounds as they briskly walk across the surface of the planet.) We're on the moon!
Plan: A: Vortis; Q: What planet is the Doctor, Ian, Barbara and Vicki on? A: the butterfly-like Menoptera; Q: Who are the original denizens of Vortis? A: the moon Pictos; Q: Where did the Menoptera flee to? A: its mind-controlled minions; Q: What is the Animus? A: the ant-like Zarbi; Q: Who are the Animus' minions? A: the larvae guns; Q: What are the Zarbi's living weapons? Summary: On the planet Vortis, the Doctor, Ian, Barbara and Vicki are swept up in the struggles of the butterfly-like Menoptera, the original denizens of Vortis who were forced to flee the planet for the moon Pictos to escape the encroaching web of the Animus and its mind-controlled minions, the ant-like Zarbi and their living weapons, the larvae guns.