BERGER: Captain, look. CAPT BRIGGS: Who? Crew members lay dead all over the stairs, well, a few of them. DOCTOR: Antimatter powers the ship. DOCTOR: Cybermen. Take cover. The Cybermen fall. The Doctor disarms him. The crewmembers all take up places that don't seem strategic at all, some behind the stack of two tiny boxes, others up on the top level of the high school bleachers. There are considerably more than a few on board. Wait until the Cybermen start. We must help.
Plan: A: Captain Briggs; Q: Who takes the Doctor prisoner? A: the Cybermen; Q: Who is taking over the ship? A: the ship; Q: What do the Cybermen start to take over? A: a traitorous crew member; Q: Who helps the Cybermen take over the ship? A: cargo; Q: What are the Cybermen using to revive other Cybermen? Summary: Captain Briggs takes the Doctor prisoner, suspecting him of being behind the murders on board. Meanwhile the Cybermen start the process of taking over the ship with the help of a traitorous crew member. The Cybermen also start reviving other Cybermen who are hidden away as cargo.