Terry landed at her new destination mid-yawn and holding an empty glass. She looked down at her glass glumly - at least let her pour some drinking water first. But her mood brightened when Eleven poked his head around the console.

"Angel!" Eleven greeted in a mix of delight and surprise, for she was looking rather disheveled in what looked like 1600s sleepwear and with her long dark hair mussed up with a bad case of bedhead.

"Hello." Terry smiled while hastily trying to brush her hair with her fingers.

Quickly deciding it was a lost cause, Terry scooped her around behind her with the hair tie she'd thankfully had the foresight to leave around her wrist. She really should have known. After squeezing in another brief adventure following their encounter with the Ood, Donna had needed to sleep. And the Doctor, despite going at least two weeks without sleep, had insisted he was fine so the Time Lords had gone off on what was supposed to be a quick date… which had turned out to be slightly more complicated. It really shouldn't have surprised Terry considering she knew what trouble her as-yet-to-be-husband could get into. But when he was grinning impishly with his hand held out to her, it was virtually impossible for her not to take his hand and run with him. Well, she was paying for it now… Or rather, someone else was going to.

"Where've you come from then?" The Doctor asked curiously, and Terry's expression turned sheepish.

"1665." She explained. "We, er, just met Pierre de Fermat… and I have a really bad feeling you're going to sleep in in the morning and poor Fermat's going to be caught in that duel."

"Ah."

The Doctor's eyes lit up with understanding and a sheepish look crossed his face as well.

"Yes… I didn't wake up in the morning, unfortunately. A rather bad day following an exceptional night, I'm afraid." He admitted just as Amy came out from under the Tardis console.

"Do you two really have to talk about your sex lives while other people can hear?" The redhead demanded. Terry just grinned.

"Hello, Amy. Sorry, didn't realize you were right there." Terry glanced around curiously. "Where's Rory?"

Amy frowned. "Who?"

"Oh…" Terry caught the Doctor's grimace. Realizing when this had to be, she muttered, "Never mind. Uh, spoilers."

Amy's frown deepened but Terry hastily moved on.

"So, what were you two up to before I got here?"

"Ah," the Doctor beamed while Amy eyed her friends suspiciously. But she didn't say anything in the face of one of Terry's spoilers and instead she listened as the Doctor explained excitedly.

"Planet One. Don't know why I haven't thought of it before."

"What is Planet One?" Terry asked, curious as she'd never heard of it before.

"The oldest planet in the universe." The Doctor explained as he stared for the doors. "And there's a cliff of pure diamond, and according to legend, on the cliff there's writing. Letters fifty feet high. A message from the dawn of time."

Instantly, he had his audience's full attention. Terry was already walking toward the doors with Amy following while the Doctor grinned at them.

"And no one knows what it says, because no one's ever translated it. Until today."

"What happens today?" Amy asked excitedly as she and Terry reached the doors beside the Doctor.

"Us." The Doctor revealed, patting the Tardis's wall fondly. "The Tardis can translate anything."

He held out his hand to Terry.

"All we have to do is open the doors and read the very first words in recorded history."

Terry didn't even hesitate to accept his hand. Although she did stop to look down at herself.

"I don't think I'm appropriately dressed for this kind of momentous occasion." She observed.

"You look beautiful no matter what. Now, come on."

The Doctor pulled her with him as Terry gave him an amused look while Amy followed, rolling her eyes but she was also smiling. Together, the trio walked out the doors onto one of the most beautiful planets Terry had ever seen. Lush greenery surrounded them and what looked like ten foot mushrooms were growing around them. And right there in front of them was what should have been the most amazing sight as an enormous cliff-side boasted fifty foot letters that were, as the Doctor had described, engraved right into the rock.

But Terry started laughing while the Doctor's expression twisted with disappointment and annoyance as Amy grinned when they read what the words said. 'Hello Sweeties'.

"Vavoom." Amy teased while Terry propped herself against the Doctor and pointed to the string of coordinates carved into the rock beneath River's greeting.

"I think we have our next destination." She observed cheekily.

The Doctor grumbled.

Terry poked her head out of the Tardis to see they had landed somewhere on a hill, right at the edge of a random wood.

"You're sure this is it?" Terry asked over her shoulder as she walked out of the Tardis, now fully dressed. Her yellow scarf fluttered a little in the wind and Terry tucked it back against her favourite red sweater dress as the Doctor came out of the Tardis behind her.

"I just followed the coordinates on the cliff face." He answered as Amy came out last behind them. "Earth. Britain."

Terry walked a little forward and then stopped in her tracks. She stared out at the sight in front of them while the Doctor checked his watch.

"One oh two am. No, pm."

By this point, Amy had seen the same thing Terry had. The redhead came to a standstill beside the Doctor while he looked up, wondering why his companions were being so quiet. He got his answer immediately.

"No, AD." The Doctor murmured as he stared out at the Roman camp set up at the bottom of the hill they were on.

"That's a Roman Legion." Amy said in disbelief.

"Well, yeah." The Doctor was still puzzled as he explained, "The Romans invaded Britain several times during this period."

"Oh, I know." Amy interrupted. "My favourite topic at school. 'Invasion of the hot Italians'."

"You're joking." Terry started laughing while the Doctor scrunched his face at Amy's words. The redhead mimicked his expression.

"Yeah, I did get marked down for the title." She admitted sheepishly.

A soldier suddenly came running up toward them. Terry tensed before she frowned in confusion as the soldier saluted the Doctor.

"Hail, Caesar!" The Roman knelt down in deference. The Doctor glanced at Terry in bewilderment before he looked back at the Roman.

"Hi." He decided a short response was the best response.

"Welcome to Britain." The Roman greeted, still bowed low before them. "We are honoured by your presence."

"Well, you're only human." The Doctor said nonchalantly before motioning to the other man. "Arise… Roman person."

"Roman person?" Terry asked.

"Well, what else was I supposed to call him?" The Doctor shot back.

"Why does he think you're Caesar?" Amy whispered, glancing between the two Time Lords, who shrugged.

Terry examined the Roman in front of them as the man added in a firm voice that spoke of his belief in his own words, "Cleopatra will see you now."

It was at that point that Terry noticed the lipstick smear on the corner of the Roman's mouth. Realization dawned and Terry all but bounced her way after the Roman. The Doctor followed much less enthusiastically, and he was almost grumbling by the time they reached 'Cleopatra's' tent. Terry ignored him as she strode into the large tent and grinned at the familiar woman seated inside.

"Hello, Sweetie." Terry greeted and River Song smiled back from her small throne.

"Angel."

River rose from where she was being served by a few servants. She was dressed head to toe in Egyptian clothing and her look was completed by a black wig and dark eye-makeup. But even then, it was a bit far fetch to say she looked anything like Cleopatra - who Terry was pretty sure was dead by this point in history anyway. Not that any of this would matter to the Roman legion River had under her spell.

"River." Amy grinned, as pleased as Terry was to see the other woman. "Hi."

Amy's words were drowned out however as the Doctor strode right up to River and he scolded, "You graffitied the oldest cliff face in the universe."

"You wouldn't answer your phone. And it's not like I can get a hold of angel separately from you - were it only possible." River sighed dreamily.

Terry chuckled while the Doctor crossed his arms irritably over his chest. Sensing that it was time to get down to business, River clapped and sent her servants out. As soon as they were out the tent, River reached back to grab a rolled up scroll before offering it to the Doctor.

"What's this?" The Doctor asked warily.

"It's a painting." River explained, all hint of her earlier teasing gone now that they were alone. "Your friend Vincent. I got it with some help."

The Doctor raised a brow at her evasiveness but he was curious enough that he snatched the painting from River. Terry peered over his shoulder as the Doctor moved to a nearby table where he unraveled the scroll.

"One of his final works." River explained. "He had visions, didn't he? I thought you ought to know about this one."

Terry barely heard her. Instead, her eyes widened as she stared down at the painting before her. The Doctor was similarly stunned and his eyes traced every detailed swirl Vincent had painted in this copy of 'Starry Night'. Except, right in the centre of the swirling sky was the Tardis… exploding into pieces. And seared across the top in black paint that swirled around with the rest of the painting but still left the words clear to be read was a single message: From the darkest nights come Demons.

Amy had wandered over by this point but she also froze in horror when she saw the painting.

"Doctor? Terry? What is this?" Amy asked in a low voice.

The Doctor just slowly raised his head. His expression was grim as he and Terry exchanged looks before the Doctor stepped back and he fell into a chair to think while Amy continued to talk.

"Why is it exploding?"

"I assume it's some kind of warning." River answered as she watched Terry watch the Doctor.

"Angel, have you seen this kind of thing before?" The Doctor asked while his mind continued to flip through his own questions and possible answers.

"No. I've never seen the Tardis exploding in a vision, not like that." Terry answered grimly.

"What, something's going to happen to the Tardis?" Amy was asking as the two Time Lords held their silent conversation.

River shook her head. "It might not be that literal. Anyway, this is where he wanted you two."

River turned to look back at the Doctor and Terry. Terry glanced over at the other time traveller as River pointed at the painting again.

"Date and map reference on the door sign, see?"

Terry nodded. She'd seen the coordinates painted on the door sign instead of the regular instructions. But what did it all mean?

"Does it have a title?" The Doctor finally asked River.

"The Pandorica Opens."

"Pandorica?" Terry repeated with a puzzled frown.

"What is that?" Amy questioned.

"A box," River explained. "A cage, a prison. It was built to contain the most feared thing in all the universe."

"And it's a fairy tale, a legend." The Doctor interrupted tensely. "It can't be real."

"If it is real, it's here and it's opening." River shot back at him.

The Doctor stood up abruptly and he reached for a bunch of scrolls. River continued sharply while the Doctor worked, "And it's got something to do with your Tardis exploding."

The Doctor laid out the scrolls he'd pulled and began examining them. Terry joined him, her eyes roaming over the many images before her, seeking the clue that would unravel this particular mystery while River watched them in exasperation.

"Hidden, obviously. Buried for centuries. You won't find it on a map."

"No," the Doctor answered in a tight voice as Terry placed her finger on something on one of the maps. The Doctor's eyes narrowed in on what Terry was pointing out and he nodded. There it was.

"But if you buried the most dangerous thing in the universe, you'd want to remember where you put it."

Terry had to admit that when she had pictured herself riding horseback, it had never quite been this uncomfortable. The horse's gallop bounced her up and down on the hard saddle without pause or relief. And she was pretty sure her tailbone was bruised by the time they saw Stonehenge in the distance. It couldn't come fast enough in Terry's opinion as her horse snorted and reared his head, jerking the reins in her hands even as they continued their steady pace alongside the others.

When they at last arrived, Terry was the first off her horse.

"I don't think I'll be doing that again anytime soon." She groaned, rubbing her butt. The Doctor glanced at her, amusement shining in his eyes as he also hopped off his own horse. Terry's horse snorted and Terry scoffed.

"Oh, you think you had it bad. You could barely feel me through the saddle whereas I think it'll take a couple days before I can sit normally again. And let me tell you, riding in oxfords? Not as easy as it looks." She informed the horse while Amy stared at her like she'd lost her mind.

"What are you doing?" Amy asked and Terry shrugged.

"I can speak human, can't I?"

With that bombshell, Terry walked behind the Doctor who had already started running toward Stonehenge. Glancing around, he started to sonic the stones all around the monument while River - wig-less and fresh-faced again - pulled out her portable computer. Terry shook her head as she looked at the pair.

"I should really get something of my own." She commented aloud. "Why have I never thought of this before?"

"Oh, so this is when you start carrying a screwdriver?" River asked as she scanned another of the pillars. "I always wondered."

"I have a different question." Amy chimed in as she joined Terry. "How come it's not new?"

She gestured around and River answered, "It's been here thousands of years. No one knows exactly how long."

Amy frowned and shifted to another topic. "Okay, this Pandorica thing. Last time we saw you, you warned us about it, after we climbed out of the Byzantium-"

"Spoilers." River interrupted quickly, placing a finger to her lips to indicate to Amy to stop talking.

Amy didn't understand and she argued, "No, but you told the Doctor you'd see him again when the Pandorica opens."

"She hasn't said it yet." Terry explained to Amy absently as she peered around the Doctor to try and get a look at his readouts. "What are you seeing?"

"I'm picking up fry particles everywhere." River reported, thinking Terry was talking to her. Which, Terry supposed, she hadn't not been doing either. "Energy weapons discharged on this site."

The Doctor finished his scans and he handed his screwdriver to Terry as he moved to stand on the center rock of the monument.

"If the Pandorica is here, it contains the mightiest warrior in history." The Doctor murmured thoughtfully. "Now, half the galaxy would want a piece of that. Maybe even fight over it."

Terry looked up at that and she looked up to the sky while Amy looked around.

"Should we be worried?" Amy asked. The Doctor nodded before he suddenly paused and leapt down from the stone he'd been standing on. He pressed his head down against the stone as though he were listening intently to something. He raised his head and looked at Terry.

"We need to get down there." She guessed and he nodded.

"Quickly."

It was dark by the time they finished setting up the devices necessary to move the rock. Terry and the Doctor had remained close together throughout the entire process, unconsciously gravitating toward each other while River orbited around the pair as they worked and Amy watched patiently.

Terry was on edge the entire time, an odd mix of excited and apprehensive. There was something big about this whole situation, Terry could feel it (not that it took a genius to know that) and the unknown excited her as it always did. But there was also a strong sense of foreboding. And something about the timing of this adventure while the Minotaur's words continued to float around in her head ever since the Planet of the Ood added to the sense that something was very wrong.

River set in the last device at last. "Right then. Ready."

Terry and the Doctor moved out of the way and River pressed the commands into her computer. There was a loud whirring noise before the stone slowly slid to the side to reveal a staircase leading down into a secret passageway. The group peered at the hole, moving gingerly closer. River switched on a flashlight while the Doctor poked his head over the top of the hole.

"The Underhenge." He murmured before he started down the stairs first. He held up his sonic like a flashlight while Terry followed behind him. She reached over to dig around inside his coat pocket and Terry withdrew his portable UV light stick. She held it up so Amy could also see as she followed behind the dark-haired Time Lady while River brought up the rear as they made their way carefully down into the Underhedge.

They soon found themselves in front of a barred wooden door that blocked the entire passage and prevented them from going any further. The Doctor spotted a torch in the corner of the room and he soniced it to light it up. River spotted another torch on the other side of the passage and she grabbed it while the Doctor held up the flaming torch so he could better see the door alongside Terry's light. River lit her own torch as Terry started to heave at the bar on the door.

The Doctor helped her, and together they dragged the bar out of the way. River grasped the doors as soon as it was unlocked and she pushed the doors open. Or, she tried to. River grunted as the heavy doors barely budged. The Doctor and Terry joined her, and together they managed to push the doors out enough that they could walk into the chamber on the other side.

The Doctor and Terry led the way in and Terry looked around the room curiously. It was enormous and clearly very old. Dust and spider webs covered every inch of the stone-walled chamber, but her attention was quickly captivated by the large, black cube with circular designs carved into its sides sitting in the center of the room.

"It's a Pandorica." The Doctor breathed, sounding as shocked as Terry felt.

"More than just a fairy tale." River commented as she lifted her torch. Terry walked over to the Pandorica, moving to the other side from the way the Doctor was doing. Something suddenly clanged and Terry jumped. She glanced over at the metal arm that the Doctor had accidentally kicked.

"Cyberman." Terry breathed as she examined the familiar silver arm. She looked back at the Pandorica as the Doctor reached it. He touched the black cube, his brows pulled into a deep frown as he started to recite the story he knew for Amy's benefit.

"There was a goblin, or a trickster, or a warrior. A nameless, terrible thing, soaked in the blood of a billion galaxies. The most feared being in all the cosmos. And nothing could stop it, or hold it, or reason with it. One day it would just drop out of the sky and tear down your world."

"How did it end up in there?" Amy wondered and Terry shrugged.

"It's a fairytale, Amy. It ended with a good wizard tricking the goblin."

Terry examined the designs on the Pandorica while the Doctor moved around to examine the prison from all angles. River meanwhile mused from behind the pair, "I hate good wizards in fairy tales. They always turn out to be him."

She nodded at the Doctor and Terry snorted. The Doctor ignored River while Amy questioned, "So, it's kind of like Pandora's Box, then? Almost the same name."

River had pulled out her computer again to scan the Pandorica but she joined Terry and the Doctor in peering at Amy suddenly.

"Sorry, what?" The Doctor asked the redhead, who looked surprised at his question.

"The story." She explained. "Pandora's Box, with all the worst things in the world in it. That was my favourite book when I was a kid."

Terry frowned. So did the Doctor.

"What's wrong?" Amy asked warily.

"Your favourite school topic." The Doctor began suspiciously. "Your favourite story. Never ignore a coincidence… Unless you're busy."

He looked back at the Pandorica, deciding to refocus on the big, important box first.

"In which case, always ignore a coincidence."

Terry however wasn't as easily distracted this time as she examined Amy intently. The redhead shifted under Terry's thoughtful gaze while River and the Doctor talked on the other side of the room.

"So can you open it?"

"Easily." The Doctor replied lightly. "Anyone can break into a prison. But I'd rather know what I'm going to find first."

River's face turned grim as she stared at her computer. "You won't have long to wait. It's already opening."

That caught Terry's attention. She made a mental note to come back to the odd coincidences this entire adventure had with apparently all of Amy's favourite things (Vincent, Romans and now Pandora's box?) while River continued to explain.

"There are layers and layers of security protocols in there, and they're being disabled one by one. Like it's being unlocked from the inside."

"That's never a good sign." Terry observed, focusing now back on the Pandorica and leaning in to listen to where she could hear the locks slowly clicking open like River had said.

"How long do we have?" The Doctor asked.

"Hours at the most." River replied and Terry shook her head.

"Shorter, the locks are opening faster." She informed the other two. "And I'm not sure we want to know what can break through this kind of security. There are at least deadlocks and time stops from what I could hear."

"There's everything." River confirmed from her computer scan. "Matter lines, you name it."

The Doctor frowned. "What could need all that?"

"I'm with Terry on this one, I think what's more important is what could get past all that." River observed.

But the Doctor shook his head. "Think of the fear that went into making this box."

The Doctor's eyes slid unconsciously over to Terry.

"What could inspire that level of fear?"

Terry missed his look but River didn't. She pursed her lips tightly while the Doctor looked back at the Pandorica. He touched it uneasily and examined the patterned side once more.

"Who are you?" The Doctor wondered. River had another question in mind.

"So why would it start to open now?"