"Hey! Who turned out the lights?"

River quickly used the blaster to make a hole .

"This way, quickly, move!" she yelled, herding them out.

"Hey! Who turned out the lights?"

In her living room, the girl watched the events on her TV.

"Dad, the Library, it's on the television now." She called.

"How many times, darling?" her Dad replied. "The Library is just your imagination."

She flipped channels, all showing different parts of the Library, till landing on one that showed an ambulance pulling up to a hospital. The crew rolled out the stretcher and the girl saw Donna on it.

"Donna?" she called.

Donna sat on a bed in a hospital room and Dr. Moon entered.

"Hello Donna." He said.

"Who are you?" Donna asked, confused.

"I'm Dr. Moon." He told her. "I've been treating you since you came here, two years ago."

She suddenly recognized him.

"Oh, God, Dr. Moon, I'm so sorry!" she said. "What's wrong with me? I didn't know you for a moment."

"And then you remembered." He said. "Shall we go for a walk?"

"No more dreams, then?" he asked as they walked through the garden. "The Doctor and that Luna girl, and the blue box, time and space."

"How did we get here?" Donna asked, confused.

"We came down the stairs," Dr. Moon told her, "out the front door. We passed Mrs. Ali on the way out."

They walked past a sign that said CAL.

"Yeah." Donna said, suddenly remembering. "Yeah, we did. I forgot that."

"And then you remembered." He replied. "Shall we go down to the river?"

They stood throwing bread to the ducks.

"You said 'river' and suddenly we're feeding ducks." Donna said.

A man walked up to them.

"Dr. Moon." He called. "Morning."

"Donna Noble, Lee McAvoy." Dr. Moon introduced them.

"Hello, Lee." Donna said, smiling.

"Hi, D-D-D-" Lee said, trying to get the word out.

"Oh, you've got bit of a stammer there…" Donna said, her smiling growing. "Bless!"

"D-D-" Lee tried again.

"Oh, skip to a vowel, they're easy!" Donna told him.

They both laughed.

Donna and Dr. Moon walked through the hospital garden.

"How did we leave it, him and me?" she asked him.

"I got the impression he was inviting you fishing tomorrow." He told her, a smile growing on his face.

Donna stepped into Lee's room, dressed up to the nines; it looked as though she was about to attend a theatre performance, not spend hours beside a pond.

"So…Fishing!"

The pair sat beneath a huge umbrella by the side of the river; Donna looked completely out of place in her fancy clothes.

"D-D-" Lee tried.

"Gorgeous and can't speak a word." Donna marvelled. "What am I gonna do with you?"

Lee carried Donna, who wore a gorgeous white wedding dress, over the threshold of their small home, the sound of church bells singing in the background.

"Welcome home, M-Mrs. McAvoy." He told her before leaning down to press a gentle kiss to her lips.

Dr. Moon sat looking at a photo album while Donna's children, Joshua and Ella, ran around the room.

"Stop it!" Donna yelled. "Stop it now, we've got a visitor."

"You've done so much in seven years, Donna." Dr. Moon said.

"Ah, sometimes it feels more like 70." Donna told him, but then she was confused. "Mind you, sometimes it feels like no time at all."

Dr. Moon rose to leave.

"Can I just say what a pleasure it is to see you fully integrated?" he told her.

Suddenly, he became fuzzy before disappearing and being replaced by the Doctor and Luna.

"No, the signal's definitely coming from the moon." He was saying.

"I'm blocking it, by it's trying to break through." Luna said until they both turned around and saw Donna.

"Donna!" he called.

"Donna, Where are you?!" Luna cried but just as she was about to answer, they disappeared and Dr. Moon was back.

"Oops, sorry." He said. "Mrs. Angelo's rhubarb surprise. Will I never learn?"

Donna backed away from him.

"The Doctor!" she said. "I saw the Doctor! And Luna! I saw them both."

"Yes, you did, Donna." Dr. Moon told her. "And then, you forgot."

Suddenly, Donna looked at him as if she had just realized he was there.

"Dr. Moon!" she said. "Oh, hello! Shall I make you a cup of tea?"

River used her blaster to open a way up into another room.

"Okay, we've got a clear spot over here." She said, ushering them all in before her. "In, in, in! Right in the centre, in the middle of the light, quickly! Now don't let your shadows cross. Doctor..."

"I'm doing it." he said, leaping over to the corner of the room, checking the shadows while Luna moved over to River's side carefully.

"Watch this," she murmured softly, throwing a wink over to the other woman. "Theta, there's no light in here and the sunset's gonna be making it's grand appearance in a few. We can't exactly stay here while you go fishing." At this, the other alien threw a quick glance over his shoulder, rolling his eyes before going back to the task at hand.

"Will you stop rushing me Loony? I'm not exactly doing this for leisure over here."

"Ya sure? I swear I can see a line attached to your big toe." Huffing, he stood to his feet then held the screwdriver in front of her. "What's that for?"

"If you're going to keep cracking jokes, you do it."

"Nah, I'm good." She told him, casually waving him off with an all knowing smirk. When he returned back to the task at hand, a look of pure determination on his face, Luna grinned at the archaeologist. "For best results, tease him a little..."

"Then bring his abilities into question." River finished, smiling at the familiar catchphrase, a certain softness in her eyes. " It's strange. You're both so young but yet, you haven't changed a bit... well, except for getting a little older."

Just as Luna was about to comment, the sonic gave a loud beeping noise which distracted the group.

"Have ya finally caught us a juicy one over there?"

"Maybe... I'm not sure. It's getting harder to tell." he told her, banging the tool against his leg with the hopes that it would work.

"Oh my god! The Doctor doesn't know something! Quick, call the press." The female alien joked playfully, attempting to lighten the heavy atmosphere though it didn't work much. "We're gonna need a chicken leg. Anyone got a spare one? Cool, thanking you Dave."

Taking the leg from him, she carefully threw it into the shadows, only to watch it being stripped bare within a fraction of a second.

"Okay." River said. "Okay, we've got a hot one. Watch your feet."

"They won't attack until there's enough of them, but they've got our scent now." The Doctor told them, moving to stand beside Lu who slipped her hand in his, offering a brief squeeze before pulling them away so they could go try to fix the sonic screwdriver.

"Who is they?" Dave demanded. "You haven't even told us. You just expect us to trust the pair of them."

"He's her Doctor and she's his Luna." River answered.

"And who are they?" Lux asked.

"The only story you'll ever tell- if you survive them." She told him.

"But you said they were your friends; they don't even know who you are." Anita said.

"Listen, all you need to know is this... I'd trust them to the end of the universe." River told them, only to have Luna call over, a smirk on her face.

"And if you're from our future babe, I bet we've already been there... Twice." This caused Professor Song to laugh until Anita cut in again.

"Well he doesn't act like he trusts you."

"Yeah, there's a tiny problem. They haven't met me yet; Luna was always the more trusting one though." She replied before walking over to the alien couple, just in time to see the time lord bang the poor device against a nearby table.

"What's wrong with it?" she asked.

"There's a signal coming from somewhere, interfering with it." He told her.

"Then use the red settings." She told him.

"It doesn't have a red setting." He told her.

"Well, use the dampers." She suggested.

"It doesn't have dampers." He said, sounding put out.

"It will do one day. You finally let Luna get her hands on it." She told him, holding up her own.

"So, sometime in the future, I just give you my screwdriver." The Doctor said.

"Yeah." She replied, smiling.

"Better yet, ya let me tinker with it?" Luna asked, giggling and pressing a loud kiss to his cheek but he quickly waved her off.

"Why would I do that?" he asked.

"Well I don't know... maybe ya finally learned to trust me."

"And I didn't pluck it from your cold dead hands, if that's what you're worried about." River assured him.

"And I know that because…?" he asked.

"Listen to me." She said. "You've lost your friend, you're angry, I understand. But you need to be less emotional, Doctor. Right now."

"Less em-I'm not emotional!" he shouted.

"There are six people in this room who are still alive," She told him, gesturing to the woman by his side. "Your moon is still alive so focus on that. Dear God, you're such hard work young." River had directed that towards Luna who simply shrugged, settling to rest her head on his shoulder before pressing a gentle kiss to the underside of her jaw.

"Young?" he demanded. "Who are you?"

"Oh, for heaven's sake!" Lux exclaimed. "Look at the two of you! We're all gonna die right here, and you're squabbling away like an old married couple!"

"Doctor..." River said. "One day, I'm going to be someone that you trust completely," she then gestured to the woman by his side. "who you trust with her completely, but I can't wait for you to find that out. So I'm going to prove it to you. And I'm sorry. I'm really very sorry."

She leaned up and whispered something into his ear. A few seconds later, she turned to Luna and did the same though she didn't take it like either of them was expecting. The moment the woman pulled away, the younger looking one jumped into her arms with a giggle.

"Oh my God Ray!" She squealed, positively beaming while River looked over her shoulder.

"Are we good? Doctor, are we good?"

"Yeah." The Doctor said finally, smiling slightly at his best friend/love's reaction. "We're good."

"Good." River replied.

"Know what's interesting about my screwdriver?" the Doctor asked. "Very hard to interfere with, practically nothings strong enough…"

"Except my hair dryer."

"But I'm working on that." The Doctor continued. "So there is a very strong signal coming from somewhere, and it wasn't there before, so what's new, what's changed?"

The others just looked at each other.

"Come on!" he said. "What's new? What's different?"

"I dunno, nothing." Dave answered. "It's getting dark."

"It's a screwdriver." The Doctor told him. "It works in the dark."

A few moments passed until the Gideon beamed brightly, her eyes trailing up to the sky.

"I'll give you all a clue. On my first ever trip with Theta, we crash landed on this glowing silver orb, a sight so beautiful that I named myself after it." Lu told them. While the others thought, River followed her eye line, smiling when she saw the moon, hanging in the night sky.

"When the dark arrives, the moon creeps from the shadows to watch over the Earth; to keep it safe from anyone who may cause it harm." River said, reciting something she'd been told long ago which earned a smile from the female alien.

"It's not real." Lux told him. "It was built as part of the Library. It's just a doctor moon."

"And a doctor moon would be?" Luna asked.

"A virus checker." Lux replied. "It supports and maintains the main computer at the core of the planet."

The Doctor turned on the sonic screwdriver.

"Well, still active." He said. "It's signalling, look. Someone somewhere in this Library is alive and communicating with the moon, or, possibly alive and drying their hair."

"That's definitely not me!"

"No," the Doctor continued as if he hadn't heard her. "The signal's definitely coming from the moon. I'm blocking it, but it's trying to break through…"

Suddenly, a fuzzy image of Donna appeared.

"Doctor!" Lu cried out happily, moving to touch the hologram.

He turned and saw the image.

"Donna!" he called but the image faded a moment later.

"Theta, can you bring her back? Please, tell me you can bring her back."

"Hold on, hold on, hold on." The Doctor told her. "I'm trying to find the wavelength. Ah, I'm being blocked."

"Professor..." Anita said, her voice trailing off and coated heavily with fear.

"Just a moment." River told her.

"It's important." She replied. "I have two shadows…"

"Okay." River told her. "Helmets on, everyone. Anita, I'll get yours."

"Don't wanna give the things any ideas but why the hell aren't they attacking us? We're the easier targets here." Luna said, glancing over to the near hysterical Anita though she tried to keep it hidden.

"Well don't complain." Theta replied, rolling his eyes.

"What goods a helmet? Didn't do Proper Dave any good." Anita pointed out.

"Just keep it together, okay?" River told her.

"Keeping it together...I'm only crying. I'm about to die, it's not an overreaction." While she said this, River carefully put her helmet on.

"Hold on a minute." Lu murmured, rushing over to her, pinching the sonic from her love's hands as she went along. When she got there, she pointed it at the visor and watched darkness fall within the helmet.

"Oh, God, they've got inside." River said.

"No, no, no. Don't be silly Ray. I've tinted her visor. If they think they're already in there, they might just decide to leave her alone."

"D'you think they can be fooled like that?" she asked.

"Maybe." The Doctor answered so the archaeologist looked expectantly to the crimson haired alien who simply stared back at her.

"Well how the hell do I know? It's a bloody swarm in a space suit! It's not like we can have a casual little chat while it tries to kill you but hey, I could try if it'd make ya happy."

"Luna!" River countered, causing the alien to drop her head slightly.

"I'm sorry Ray... Humans just annoy me on occasion! Asking stupid questions, wasting precious time." she snapped slightly though she quickly fell silent when the Doctor shot her a look.

"Can you still see in there?" Dave asked Anita, trying to distract the trio.

"Just about." She replied.

"Just, just, just…stay back. Professor, a quick word, please." the time lord said.

"What?" she asked.

"Down here." He said, pulling her down as Luna crouched next to him.

"What is it?" she asked.

"Like you said, there are six people still alive in this room." He said.

"Yeah, so?"

Luna looked around, searching for what he'd managed to find before groaning quietly to herself.

"Six people... seven shadows... six people and a swarm in a suit."

As the other five turned to look where Luna and the Doctor were looking, they saw another figure in a space suit standing in the background.

"Hey! Who turned out the lights?"

"Time to get our backsides moving!" Lu cried, jumping to her feet.

"What?"

"Just run!" the Doctor shouted, grabbing onto Luna's hand before taking off. Luckily, she managed to take hold of River's hand.

They ran and the swarm chased them.