(BARBARA goes and investigates this sign of the planets' renewal. BARBARA: And look! CORRIDOR OUTSIDE CHAMBER OF THE ANIMUS
(The DOCTOR and VICKI are led down a corridor to what appears to be a dead end. IAN: Barbara, Vicki. PRAPILLUS: To the planet Pictos. The Destructor! The two ZARBI, now defenceless, scuttle off into the Carsenome as HROSTAR falls dead on top of the larvae gun, crushing it in the process. VICKI struggles to sit up.) Vortis to main force.
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.