They wander next into the medical bay. Henry's crewmen are lying in beds suspended from the ceiling by wires. They're all alive but unconscious, hooked up to tubes and scanners. Henry rushes over to Moppet, Amy to Rory and the Doctor to the TARDIS. (The TARDIS is not lying on a bed, but stashed in a corner.) Henry moves to free Moppet, but the Doctor advises caution. The black spots, he discovers, are tissue samples. They start to disconnect Rory but the machinery beeps and he begins to struggle. The Siren approaches. The Doctor, Henry and Amy hide and watch as the Siren sings over Rory. He grows calm. "It's anesthetic," the Doctor says. "The music - her song - so she anesthetizes people then puts their body in stasis." The Siren moves over to Moppet. Henry whips out his gun and fires. The Siren turns all demon-red and shrieks at him. She growls and hisses, advancing on him until the Doctor sneezes. The Siren approaches him, her hands suddenly lighting up with fizzy fire. The Doctor talks himself into realizing it's a sterilization method. He blows his nose into a hankie and tosses it on the floor, where the Siren promptly sets it ablaze. He prattles on some more and then: "She's not a killer at all! She's a doctor!" She's a virtual doctor, running on autopilot, bringing the crew aboard to heal them. Kind of excessive for the paper cuts most of them had, but whatever.
Every time Amy tries to free Rory, Dr. Siren shrieks at her. "She's keeping them alive but she doesn't know how to heal them," the Doctor says. They try to reason with Dr. Siren, but she just stares at them with dead eyes. A tear rolls down Amy's cheek. This somehow breaks through to Dr. Siren, who holds her hand out to Amy. A golden ring of light appears around her hand. "A consent form," the Doctor whispers. He tells Amy to put her hand in the light. She does and Dr. Siren blinks out of view. The instant they switch the machinery off Rory's bed, he starts convulsing and gasping for air. "He'll die if you take him out," Henry says with an understanding he shouldn't have. So they switch the thing on and he goes stills. Amy wakes him gently and explains the situation. Apparently, since he was in mid-drown when Dr. Siren nabbed him, he'll continue drowning if they disconnect him. What kind of shitty doctor is this Siren? She can't even do CPR? So basically he can lie there forever and let the Siren kinda-sorta take care of him or he can get up and risk dying. He thinks about it for a second. "I'm a nurse," he says, in case anyone forgot. "I can teach you how to save me." Amy gets a bit panicky at that. What if she does it wrong? What if he doesn't come back to life? Tears stream down her cheeks. "What about him?" she asks, looking at the Doctor. "I mean, why do I have to be the one? Why do I have to save you?" "Because I know you'll never give up," Rory says. Aw.