(She reaches out to it.) (The DOCTOR furiously turns on the ZARBI.) BARBARA stands in the first entrance. HROSTAR: And...of the strength...of the larvae gun. IAN: Vicki! She hears the chirruping of the ants - the ZARBI - and gets up and continues her escape.) VORTIS
(The DOCTOR and IAN continue their trek across the planet. VORTIS
(The butterfly creature catches up with BARBARA. Who are you?
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.