DOCTOR: Harry, were you trying to undo this? SARAH: The Vogan rocket? STEVENSON: And to you. [SCENE_BREAK]
TYRAM: The rocket is closing on the Cybermen's ship.
Plan: A: the Cybermen's relay device; Q: What do the Doctor, Harry and Lester try to destroy? A: Sarah; Q: Who is still on board Nerva when the Vogans prepare to destroy it? Summary: The Doctor, Harry and Lester try to destroy the Cybermen's relay device, while the Vogans prepare to destroy Nerva even though Sarah is still on board.