"Protego!" yelled Hermione with a flick of her wand. The Dalek's beam weapon deflected up to shatter a light fixture overhead. She immediately followed up with "Confringo!"
The curse struck the Dalek's eyestalk. "What is happening?" it screamed before it popped and lurched to a halt, steam and smoke billowing from the burst seams along its casing.
Hermione kneeled next to Harry and pointed her wand at the black ropes that held him tight. She took a moment to steady herself before casting a quick severing charm to cut him free.
"Thank you, Hermione," he said as he shook feelings back into his arms and legs. He looked around at the cratered walls, the shattered windows, and the bodies strewn around the diner. He ran to one of the bodies and knelt, checking for any sign of life.
Behind him, Hermione raised her wand and said "Homenum Revelio," then shook her head. "I'm sorry, Harry, but the only ones alive here are us and them." She nodded in the direction of the two unconscious Death Eaters.
"I can't believe it," Harry said softly. "How did that thing kill everybody? What was it?"
Hermione shook her head. "I don't know. I'm almost positive I've seen it before, or at least a picture of it. If I could just remember where."
"We have to get out of here!" Ron's eyes were wide. "What if they send more?"
"Oh, all right!" Hermione snapped.
"Not yet," Harry said. "We should do something." He walked around, looking at all the bodies as Ron approached the dim, still form of the Dalek. Ron closed one eye and looked down one of the tubes.
"I should have recognized them when they came in," Harry said when he got to the Death Eaters. "They were both there when Dumbledore died.
"I would suggest we clean up the place a bit, but I don't think that's really doable anymore. The Ministry's going to have a field day with this."
"What should we do with them?" Ron asked. "Kill them?"
Harry and Hermione both barked "No!" at the same time.
"We just need to erase their memories of the last few minutes," Hermione said. "That should throw them off the trail."
"If you say so." Ron sounded skeptical. "Can you do that?"
"I think so," Hermione replied testily. "It can't be any harder than what I did to my parents!"
Ron looked down at his feet as Harry shot him a reproachful look. "Sorry, 'mione," he muttered.
Hermione pointed her wand at the darker Death Eater. "Obliviate!" she said calmly, then turned to the other one and did the same. Ron and Harry muscled the two into their booth, sitting them up across from each other.
"How did they find us?" Hermione asked. "Does Harry still have the Trace on him?"
"Can't have," Ron said. "The Trace disappears the moment he turned 17. You can't put one on an adult, that's the law!"
"Do you really think the Ministry cares about the law?" Hermione said.
"Even if it were possible," Harry said, "when could someone have done it? I haven't been alone with anyone but you and Ron's parents since I left Privet Drive."
Hermione said nothing as she looked back at the two Death Eaters. "We need to get out of here," she finally said as sirens grew louder. "The longer we stay, the more likely we are to get found out. Ron, get the lights."
"Where are we going to go?" he said has he fumbled to get the Deluminator out of his pocket.
"We could go to Gr-" Harry started to say.
"Don't say it!" Hermione snapped before he could finish. "Not in front of them!"
"Hermione, they're unconscious!" Ron pointed out. "It's not like they can hear us!"
"Let's get going, then," Harry said.
Ron flicked the Deluminator, throwing the diner into darkness. The only light came from the street lamps in the street.
Hermione paused for a second on her way out to look at the Dalek, racking her brain to remember where she would have seen one before. She looked around quickly after she closed the door, then touched the tip of her wand to the lock and muttered the locking charm under her breath.
The three hustled down Tottenham Court Road, putting as much distance between themselves and the diner before the police (or worse, the Ministry of Magic) arrived.
"I still think we should go to Grimmauld Place," Ron muttered, more to feel like he was trying than to change his friends' minds.
"But," Hermione said before Harry cut her off.
"Snape can't get in anymore, they've put up jinxes against him, right? And even if he does get past them, I would like nothing better than to get at him for what he did." Harry stopped and glared at Hermione.
She looked back, surprised that he was arguing with her, and that he looked angrier than she'd seen him in weeks.
"All right," she sighed. " Grimmauld Place it is. Let's find a place to Apparate without..."
Her voice trailed off as she spotted a Dalek turn onto Tottenham Court Road up ahead.
Ron swore under his breath. Harry gasped "Merlin's Beard!" Hermione turned around to see a couple more on the road barely a hundred metres behind them.
It took a few seconds for everyone else on the street to realize what they were seeing, and even then it took a few of them to be struck down by the Daleks' beam weapons for them to start screaming.