CONTROL ROOM
(The ZARBI push the DOCTOR into the centre of the room. There is an explosion on the wall and the ZARBI and the larvae gun rush round in a panic through the smoke filled room.) IAN: Ants. As the DOCTOR crosses back to IAN and VICKI, the ZARBI sink to the ground and are still.) Of the Menoptra invasion? Vortis is ours. MENOPTRA VESTRIN: The Animus. It grew like a fungus. IAN: So you left the planet? IAN: Can you live up there? Crater of Needles. IAN: Yes, like friend Barbara.
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.