(The DOCTOR races to the control panel. (ZAROFF's guards seize the DOCTOR and BEN.) ZAROFF is unable to escape.)
Plan: A: Zaroff's plan nearing completion; Q: What is the reason for the Doctor and Ben to destroy Atlantis? A: Ben; Q: Who is the Doctor with when he realizes the only way to save the world is to destroy Atlantis? Summary: With Zaroff's plan nearing completion, the Doctor and Ben realise the only way to save the world is to destroy Atlantis.