The TARDIS materializes in a red-waterfall gallery where the Appaloosas have deposited all their favorite works of art. The Mona Lisa is there, along with a nude sculpture and an oozing purple tower that would look fabulous in my dining room. Why would they keep their priceless collection in an infection zone? Who knows?
Amy finds her way to another white room, this one occupied by plain white arches and an octagonal console. The Interface tells her the room is the Gate, which leads to all the facility's entertainment zones. Amy picks a vast, fancifully landscaped garden and takes the opportunity to pick the Interface's brain. She eventually finds out that the hand-bots couldn't sense her earlier because she was near a vent that "channels temporal exhaust fumes" from the engines that run the place. The exhaust messes with their sensors. Two hand-bots beam in. As they both reach for her, she grabs their hands and touches them together. This shorts out the hand-bots. Either this is a blatant design flaw or the manufacturer was trying to cut down on douchey high-fives. Amy makes her way to the temporal engine room and uses her lipstick to write the Doctor a message on the door.
Rory wanders around the seemingly empty facility. Even though there are thousands of people there, they all exist in slightly different timestreams so they don't interact. Suddenly, Amy is there, wielding a sword and wearing a suit of armor she's cobbled together from bits of hand-bots. She raises up the visor on her helmet and reveals an older face, soft and slightly wrinkled. Her hair still looks as fabulous as ever, though. "I waited for you," she says in a deeper voice. "I think the timestream lock might be a bit wobbly," the Doctor says. Amy raises up her sword and skewers a hand-bot standing behind Rory. She techno-babbles about how she's rigged up her own sonic probe and uses it to reprogram the hand-bots' "black box" so no one can figure out she's the one killing them. She also tells him to stay away from their hands, which contain an anesthetic. Amy is very matter-of-fact about it all while Rory quietly loses his mind. "But you're still here," he says helplessly. "You didn't save me," she says. He explains he's trying to save her now but the Doctor got the timing wrong. Amy reveals she's been on her own for 36 years. She's grown to hate the Doctor more than she's ever hated anyone before. Rory thinks he'll just get back into the TARDIS, go back in time and prevent any of this from happening, but for some contrived reason it's not possible.