Takes place after 4.10 "Midnight"

The first time he meets her; there is an odd sense of déjà vu about the moment. It starts out with a message, an impossible message – "Come as soon as you can. X," followed by a date and a set of coordinates. He immediately thinks of a certain curly-haired archeologist, but it can't be her. She died. But what if….

He decides to go take a look, just in case. The coordinates take the TARDIS to London; the date, to the Victorian era. They exit the TARDIS to find themselves outside of a pub, where they are soon approached by a rather dazed-looking gentleman.

He bows hurriedly. "Greetings, my Lord. Her Majesty, Queen Victoria, would like to speak with you." He says, before finally looking up at them. The Doctor & Donna exchange a look, about the state of the man's face – a pink smear is staining the area around his lips.

"Right. And, just so we're clear – you think I am who, exactly?" The Doctor asks.

"Why, the Archduke of Canterbury, of course!" The man says, before walking towards the pub, the Doctor and Donna following behind him a minute later.

The gentleman leads them to a private room at the back of the pub, then ushers them inside, proclaiming, "Her Majesty, Queen Victoria!"

The door is shut, and they are left in the room, alone except for a mysterious woman, standing with her back to them, who the Doctor guesses must be the "Queen".

She is of medium build, and dressed according to the time period – a tightly fitted, elaborately embellished bodice, with sleeves reaching to her elbows and ending in frills, and white kid gloves. The skirt has that ridiculous bustle that is oh-so-popular during this time period.

What makes him truly stop and stare in confusion, though, are the tiny details. The color of her dress, for example – TARDIS blue – and her hair. It's not the right type - its all straight and boring - but the color is exactly the same. It is pulled up and tied back in a series of intricate knots, with a bit of dark coloured fabric woven into it. She is staring out of the window, with her back to them, but he would recognize that hair anywhere, even if he'd only seen it once before.

"Hullo, D-" she begins to say, as she turns around, but her voice falters and her face falls as she sees their faces. She quickly regains her composure, however.

"Hello, Doctor." She says, moving closer.

"You're not Professor Song. I thought you were Professor Song." He says, and her face lights up.

"Really?" she asks excitedly. "You thought I was her? Oh, that's fun. I'm not, obviously, but still. It's the hair, isn't it? I know it's not the eyes – " she probably would've continued rambling, if the Doctor hadn't cut her off there.

"Who are you?" he asks, confused. "'Cos you're definitely not Her Majesty. And while we're on the subject of who you are, how did you get a message through to my psychic paper? And what did you do to that gentleman, the one who brought us here?"

She just smirks, and reaches down the front of her dress, pulling out a tube of lipstick.

"Oh, he was quite eager to help me." She says, flashing them a cheeky grin. "All it took was a kiss."

"And what's that supposed to mean?" Donna asks, startling both the Doctor and the mystery woman.

"Donna Noble, the temp from Chiswick." The girl says, tilting her head slightly as she examines Donna. She just stares at her for a minute or two before saying, "Hallucinogenic lipstick. That's what it means."

She then turns to look at the Doctor once more. "As for how I sent the message, you taught me how."

The Doctor scoffs. "I'm pretty sure I'd remember that."

"You haven't taught me yet, stupid. But you will." She says with another smirk, before turning towards the door.

"Where you goin', missy?" Donna calls, making the girl – for she cannot be called a woman, she is no more than 17 – stop and turn.

"Are you sure you aren't Scottish?" the unknown girl asked cheekily, before answering Donna's question.

"I assumed you would be curious as to why I had asked you here in the first place." She said, before continuing out the door, Donna and the Doctor hot on her heels.

"So, Doctor, you've really never met me before?" she asked, somewhat incredulously.

"No, I really haven't. So would you mind telling me who you are, exactly?"

"Ah ah ah!" she said, mock scolding. "Spoilers!"

"Will you at least tell me your name?" he asked, exasperated that this was now the second person who had used that term with him. She stopped, hailed a horse-drawn cab, and got them on their way before speaking again.

"I've gone by many names…." She mused. "You know River Song, yes?"

Both the Doctor and Donna nodded.

"Well then," she said mysteriously, "I suppose you could say she sent me."

"Sent you to do what, exactly?" the Doctor asked, his voice dangerously low.

"Isn't it obvious?" the girl asked, as the cab drew to a halt. "To be your Guardian Angel, of course. Now, does that answer your question?"

"What? You really expect us to believe that your name is Guardian Angel?" The Doctor scoffed, and the girl wrinkled her nose.

"What? No, that would be a rubbish name!" she said, thoroughly appalled. "It's just the Angel, thank you very much. Now then, shall we discuss why I invited you here to begin with?" And with that, she disappeared inside of the house that they had pulled up in front of.

A house on Paternoster Row.

By the end of their adventure, the Doctor knew a little more about the Angel. She was brilliant, mysterious, flirtatious – although her flirting was mainly directed at everyone but him – and more like the enigmatic River Song than he would ever be likely to admit. He knew nothing more about her, and these things he had only learned through observation during their adventure. They had managed to stop a Silurian named Vastra from killing tunnel diggers as a form of revenge for the deaths of her sisters.

Now, they were heading back to the TARDIS, with the Angel tagging along behind them. Once she saw that beautiful blue box, though, she froze.

"Oh my lord." She whispered, and the Doctor grinned. However, that quickly turned to a frown when he realised: How did she know what the TARDIS was?

"I know! Isn't she brilliant?"

But that's not what she was thinking.

"What've you done to her?" she cried, skirts flying as she ran to the police box.

The Doctor spluttered, and Donna laughed.

"What? What d'you mean, what've I done to her?" he demanded.

The Angel whirled around. "What, you never thought to clean her up at all?" she demanded, then gave the Doctor a look that he recognized – it was one of those looks that Professor Song had given him, one that said, "If you only knew who I was," and "I'm about to blow your mind" at the same time. When he thought about it, it was slightly ridiculous how often he actually thought about Professor River Song after only having met her once.

"D'ya mind if I go inside?" the Angel asked sweetly, drawing his attention back to the moment at hand.

"Yeah, hang on a mo', it's locked…" the Doctor trailed off, rummaging through his suit pockets as he searched for his TARDIS key. The Angel smirked again, and with a loud snap! Of her fingers, the doors flew open, and she walked inside.

"WHAT?" the Doctor said loudly, shocked. "WHAT?!"

And they could hear the Angel's responding laughter from inside of the TARDIS.