Okay, here's the last chapter of 'The unicorn and the wasp'. I'm sorry that it's later than usual but it was my big brother's birthday last night so we all got a … tiny… but drunk. Well, a little drunk. Well, drunk. Well, very drunk but there isn't much difference.

Again, I apologise but it's hard to work through leg ache and head ache.

Another two announcements.

One: I will be starting work experience in a week so updates will be postponed for a few weeks… though I will try my hardest to update… even if I have to write at work.

Two: I'd like you to tell me if you want me to write the next episode… if so, drop a review please.

Dedication: I'd like to dedicate the chapter to alyssalove (Thank you darling )and iulik (Don't worry, I won't just stop but please don't murder .)

The Doctor stood in front of the fireplace in the sitting room, facing Agatha Christie who sat on one couch nervously, his hands clasped tightly behind his back. A moment after he sighed loudly, running his hands though his hair as though it would held the thought patterns, the door opened and the other two ladies walked in.

"That poor footman." Donna said. "Roger's dead and he can't even mourn him." Sighing, she launched herself onto the other sofa though Luna didn't join her. Instead, she paced around the room, performing the same move as the Doctor had, musing the red curls she owned.

"1926." She said, standing beside her love before taking his hand into hers. "It's more like the dark ages."

"Did you enquire about the necklace?" Agatha asked.

"Lady Eddison brought it back from India." Donna told her. "It's worth thousands."

"This thing can sting, it can fly…" the Doctor ground out."It could wipe us all out in seconds-why is it playing this game?"

Luna, sensing that his mind was beginning to go into a mental overdrive, stood behind him. Once he released her hand, she wrapped herself around his body though she had to stand on her tip toes so she could place her head onto his shoulder. Smiling, he turned around quickly, catching her off guard, and pressed his lips to hers, enjoying the feeling.

"Every murder is essentially the same-" Agatha told them. "They are committed because somebody wants something."

"What does a Vespiform want?" the Doctor asked, pulling away from Luna's embrace.

"Doctor, stop it." Agatha said. "The murderer is a human as you or I."

"You're right." The Doctor said, sitting up. "I've been so caught up with giant wasps, I've forgotten."

He moved so he was sitting across from her, his love moving to perch herself on his lap.

"You're the expert." He told her.

"Look, I told you." She said. "I'm just a…purveyor of nonsense."

"Oh, no, no, no, no, because plenty of people can write detective stories, me included but I'm sorry to say they stink worse than London in the summer of 1858. Believe me, the great stink was a very apt description for what happened that summer. Anyway, your detective stories are amazing… not as good as Sir Arthur Conan Doyle's but…. Hold on a minute… you practically copied him! Poirot is like Sherlock, Hastings is like Watson, Lemon is practically a Mrs Hudson stand in and Japp is a Lestrade knock off if I ever did see one!" Lu vented, her hands flailing almost wildly in the air as she spoke to the woman but the Doctor quickly covered her mouth.

"Why, why are you so Good, Agatha Christie? Because you understand. You've lived… you've fought… you've had your heart broke. You know about people- their passions, their hopes and despair and anger, all those tiny huge things that can turn the most ordinary person into a killer. Just think, Agatha. If anyone can solve this, it's you."

Everyone gathered in the sitting room and the Doctor got up and stood in front of the fireplace.

"I've called you here on this endless night because we have a murderer in our midst." He told them. "And when it comes to detection, there's none finer…Ladies and gentlemen, I give you Agatha Christie."

He moved over to the chair where Donna had sat herself, Luna sat by her feet, and took a seat on the arm of it, his arm resting across the back of it. The other alien leaned back against his feet, one hand playing with the bottom of his pants absentmindedly.

Agatha stood in front of the assembled suspects.

"This is a crooked house…" she told them. "A house of secrets. To understand the solution, we must examine them all. Starting with you…Miss Redmond."

"But I'm innocent, surely." Robina protested.

"You've never met these people and these people never met you." Agatha told her. "I think the real Robina Redmond never left London. You're impersonating her!"

"How silly." Robina said. "What proof do you have?"

"You said you'd been to the toilet…" Agatha said.

"Oh, I know this!" Donna said. "If she was really posh, she'd say 'loo'."

"Donna, please be quiet. I don't want to miss the ending… I'm still trying to figure this out." Lu murmured.

"Earlier today, Miss Noble and I found this on the lawn…" Agatha continued, holding up the leather box. "Right beneath your bathroom window. You must have heard Miss Noble and Lady Carter were searching the bedrooms and you panicked. You ran upstairs and disposed of the evidence."

"I've never seen that thing before in my life." Robina told her.

"What's inside it?" Lady Eddison asked.

"The tools of your trade, Miss Redmond," Agatha said, opening the case. "Or , should I say…the Unicorn?"

She showed the tools to everyone.

"You came to this house with one sole intention-" Agatha accused, "to steal the Firestone!"

Robina hesitated.

"Oh, all right then." She said, her true cockney accent coming out. "It's a fair cop."

She got up and moved to stand next to the Colonel.

"Yes, I'm the bleedin' Unicorn." She told them. "Ever so nice to meet you, I don't think. I took my chance in the dark and nabbed it."

The Doctor got up and moved to Agatha's side.

She reached into her dress and pulled out the jewel.

"Go on then, ya nobs, arrest me." She told them. "Sling me in jail."

She threw the necklace at the Doctor, who caught it.

"So, is she the murderer?" Donna asked.

The Doctor took a seat beside the ginger companion and Luna got up, moving over to the thief, quickly hugging her while the other alien was too busy examining the firestone.

"Wow there sweet cheeks, not without dinner first."

"Believe me honey, I would happily. The piece of kit you're carrying is definitely worth it though I don't think my friend will approve."

"Well, did she do it!" Donna cried, getting annoyed at being ignored.

"Don't be so thick." Robina told her. "I might be a thief, but I ain't no killer."

"Quite." Agatha agreed. "There are darker motives at work, and, in examining this household…we come to you…Colonel."

"Damn it, woman!" Hugh proclaimed. "You with your perspicacity! You've rumbled me!"

He got up from his wheelchair and stood.

"You-you can walk?" Lady Eddison asked, confused. "But why?"

"My darling, how else could I be certain of keeping you by my side?" he asked.

"I don't understand." She said.

"You're still a beautiful woman, Clemency." Hugh told her. "Sooner or later, some chap will turn your head. I couldn't bear that. Staying in the chair was the only way I could be certain of keeping you."

He turned back to Agatha.

"Confound it, Mrs. Christie!" he said. "How did you discover the truth?"

"Um, actually I had no idea." Agatha told him. "I was just going to say you were completely innocent."

"Ha. Rumbled!" Luna laughed, walking back to the Doctor who tapped her playfully on the arm before placing a finger on his lips.

"Ah…" Hugh said. "Oh."

"Sorry." Agatha told him.

"Well, shall I sit down then?" he asked.

"I think you better had." Agatha agreed.

"So, he's not the murderer?"

"Indeed not." Agatha agreed. "To find the truth…let's return…" she held out her hand and the Doctor gave her the Firestone, "to this-far more than the Unicorn's object of desire. The Firestone has quite a history. Lady Eddison."

"I've done nothing." Lady Eddison proclaimed.

"You brought it back from India, did you not?" Agatha asked her. "Before you met the Colonel. You came home with malaria and confined yourself to this house for six months, in a room that has been locked ever since, which I rather think means-"

"Stop, please!" Lady Eddison interrupted.

"I'm so sorry." Agatha told her. "But you had fallen pregnant in India…unmarried and ashamed, you hurried back to England with you confidante, a young maid, later to become housekeeper, Miss Chandrakala."

"Clemency!" Hugh gasped. "Is this true?"

"My poor baby." Lady Eddison said sadly. "I had to give him away. Oh, the shame of it."

"But you've never said a word!" Hugh said.

"I had no choice." Lady Eddison told him. "Imagine the scandal, the family name. I'm British-I carry on."

"And it was no ordinary pregnancy." The Doctor said.

"How can you know that?" Lady Eddison demanded, glaring intensely at the man through narrowed eyes.

"Excuse me, Agatha, this is mine and the Doctor's territory." Lu said.

"But when you heard that buzzing noise in the dining room, you said ' It can't be'. Why would you say that?"

"You'd never believe it." She replied.

"The Doctor has opened my mind to believe…many things." Agatha told her as she sat down.

"It was forty years ago…" Lady Eddison told them slowly. "In the heat of Delhi one night. I was alone and that's when I saw it-a dazzling light in the sky. The next day, he came to the house-Christopher, the most handsome man I'd ever seen. Our love blazed like a wildfire and I held nothing back. And in return, he showed me the incredible truth about himself. He made himself human to learn about us. This was his true shape."

She took a deep breath.

"I love him so much it didn't matter." She continued. "But he was stolen from me. 1885, the year of the Great Monsoon. The river Jumna rose up and broke its banks. He was taken by the flood. But Christopher left me a parting gift-a jewel like no other. I wore it always. Part of me never forgot. I keep it close. Always."

"Ooo, does that mean you were in London in 1858? Did you smell the Thames? Bloody hell, that was enough to knock anyone's socks off."

"Will you forget about that for a minute?" The Doctor asked, staring at her through wide eyes but she shook her head.

"Never. You were all for going to the theatre but instead, we got stuck on the banks of the Thames. Three days we were trapped in there! Three days!" She shrieked but he only wrapped an arm around her waist, tugging her into his side.

"You loved every minute of it."

"I tried to."

"Just like a man-" Robina said, "flashes his family jewels and you end up with a bun in the over."

"A 'poor little child'." Agatha said, picking up the story. "Forty years ago, Miss Chandrakala took that new born babe to an orphanage. But Professor Peach worked it out. He found the birth certificate."

"Oh, that's 'maiden'-" Donna said, "maiden name."

"Precisely." Agatha confirmed.

"So, she killed him." Donna concluded.

"I did not!" Lady Eddison protested.

"For God's sake Donna… if you ask that question one more time, I'll send you after the TARDIS's manual." Luna threatened, glaring at her. Donna just rolled her eyes, not believing the threat for a moment. There was no need to fear it as she knew it wouldn't happen. Knowing that she wouldn't, Lu flipped her the bird, an innocent smirk on her face when the Doctor stared down at her in shock.

"Miss Chandrakala feared that the professor had unearthed your secret." Agatha told her. "She was coming to warn you."

"So, she killed her." Donna said. A few feet away, the crimson haired alien bit her tongue so she wouldn't lash out at the other woman, despite how much she really wanted to.

"I did not!" Lady Eddison repeated.

"Lady Eddison is innocent." Agatha announced. "Because at this point…Doctor?"

"Are you accusing him now?-" Lu asked, shrugging slightly before moving on. "- I don't really care. I just want to make sure so I can avoid paying bail 'cause it's happened one too many times. The last time… well, indecent exposure at the coronation of…. I want to say Victoria but I can't be sure."

"Would you just shut up for a minute… and Thank you Mrs Christie." He said, moving to stand in front of the fire place.

"Because at this point," the Doctor said, continuing, "when we consider the lies and secrets and the key to these events, then we have to consider…it was you, Donna Noble…-"

He pointed at her.

"What ?" she demanded. "Who did I kill? I didn't kill anyone!"

"Are you sure? You once tried to bite my fingers because I stole one of your pringles." Lu told her

"Will both of you stop it?" The Doctor demanded.

"Sorry." They both muttered.

"Thank you." He replied. "And if you all had just waited a moment, you would have heard me say that Donna didn't kill anyone, but she was the one who said it all along, the vital clue-that this whole thing is being acted out like a murder mystery. Which means…it was you, Agatha Christie."

He pointed at her.

"I beg your pardon, sir?" she demanded.

"So, she killed them." Donna said.

"That's it…" Luna growled, launching herself at the older woman but the Doctor grabbed hold of her again, yanking her back to him so she couldn't stray far.

"No, but she wrote. She wrote those brilliant, clever books. And who's her greatest admirer? The moving finger points… to you! Lady Eddison."

"Oh, leave me alone!" she moaned.

"So, she did kill them." Donna said.

"One more time babe. Go on! Say it one more time and I will kick your behind from her to Australia… and I don't give a flying monkey if Theta is holding me back or not."

"No, but just think…" the Doctor said. "Last Thursday night, what were you doing?"

"Uh, I was, uh…I was in the library." Lady Eddison answered. "I was reading my favourite Agatha Christie thinking about her plots, and how clever she must be. How is that relevant?"

"Just think." The Doctor told them. "What else happened Thursday night?" The Doctor said before turning to Golightly.

"I'm sorry?" Golightly asked.

"You said on the lawn this afternoon." The Doctor told him. "Last Thursday , those boys broke into your church."

"That's correct…" Golightly replied. "They did. I discovered the two of them-thieves in the night. I was most perturbed. But I apprehended them."

"Ah ha! Clicky clicky click click click. I know where you're going. A man, in his forties, taking on two young boys?"

" forty years old…exactly." The Doctor corrected, smiling slightly when his plan clicked in her head.

"Oh, my God!" Lady Eddison gasped.

"Lady Eddison, your child-how old would he be now?" the Doctor asked.

"Forty." Lady Eddison whispered. "He's…forty."

"Your child has come home." The Doctor told her.

"Ha!" Golightly exclaimed. "This is poppycock!"

"Oh?" the Doctor replied. "You said you were taught by the Christian fathers, meaning, raised in an orphanage."

"My son!" Lady Eddison exclaimed. "Can it be?"

"You found those thieves, Reverend, and you got angry." The Doctor told him. "A proper, deep anger for the first time in your life and it broke the genetic lock. You changed. You realized your inheritance. After all these years…you knew who you were. Oh, then it all kicks off, 'cause this…" He held up the Firestone, "isn't just a jewel-it's a Vespiform telepathic recorder. It's part of you-your brain, your very essence. And when you activated, so did the Firestone. It beamed your full identity directly into your mind. And at the same time, it absorbed the works of Agatha Christie directly from Lady Eddison. The mechanics of those novels formed a template in your brain. You killed in this pattern because that's what you think the world is. Turns out we are in the middle of a murder mystery. One of yours, Dame Agatha."

"'Dame'?" Agatha questioned.

"Not quite yet Doc." Luna told him, turning to peck his cheek lightly.

"Sorry," he told Agatha. "Not yet."

"So, he killed them?" Donna asked. "Yes? Definitely?"

"Yes." The Doctor answered.

"Oh thank god. I really didn't want to hurt you."

"Well, this has certainly been a most entertaining evening." Golightly said. "Really, you can't believe any of this, surely, Lady Eddizz-"

"Lady who?" the Doctor asked.

"Lady Eddizzon…" Golightly struggled to get out.

"Got a frog in… no wait… got a bee in your throat, Vicar?" Lu taunted, sticking her tongue out at the person, realising a moment later that winding the huge waspy thing up wasn't the best idea in the world.

"Don't make me angry." Golightly told them, standing up.

"Why?" the Doctor asked. "What happens then?"

"Damn it!" Golightly shouted. "You humanzzz! Worshipping your tribal sky godzzz!"

"Okay." Luna told him. "Quick suggestion… avoid every word that has an S or a Z from now on because it is extremely embarrassing when a forty year old can't even speak properly."

"I am so much more!" he shouted at them. "That night, the universe exploded in my mind! I wanted to take what wazz mine. And you, Agatha Christie, with your railway station bookstall romancezzz…What'zzz to stop me killing you?"

"Oh, my dear God!" Lady Eddison said, reaching for him. "My child!"

"What'zzz to stop me killing you all?" he demanded, transforming.

"Forgive me!" she shouted.

"No, Clemency!" Hugh shouted. He and Greeves pulled her away to the door. "Keep away! Keep away, my darling!"

"No!" Agatha shouted, holding up the Firestone. "No more murder! If my imagination made you kill, then my imagination will find a way to stop you, foul creature!"

She ran out of the room.

The trio chased after her as the Vespiform chased after them.

"Great!" Donna shouted. "Now it's chasing us!"

"Yeah Donna, it happens. Now, whatever is about to happen, don't get hurt and don't freak out."

"Why would I?" The female alien offered no explanation. Instead, she picked up her pace and sprinted out of the door, leaving the others behind. The moment this happened, the moment she disappeared, Donna could see worry and panic working its way onto the Doctor's face.

They both ran outside, shutting the doors behind them then turning to run once more. Just as they reached the road, they saw Agatha drive past them, honking the car horn. However, sat on the back, was Luna, her hands clutching onto the car so she didn't fall off when the writer stopped the car.

"She has a car." Donna pointed out.

"Come on!" the Doctor shouted as they ran towards the car.

As they reached about the halfway point, the Vespiform broke through the door.

"Over here!" Agatha shouted. "Come and get me, Reverend!"

"Agatha, Luna, what are you doing?" the Doctor shouted.

"If I started this, Doctor, then I must stop it!" she yelled back before driving off down the drive. A moment later, the wind carried over a yell which sounded like nothing more than a faint whisper.

"Sorry Theta.."

The Doctor spotted another car and ran to it.

"Come on!" he shouted.

The Vespiform hesitated before flying after Agatha's car. The Doctor and Donna followed after in the second car.

"You said this is the night Agatha Christie loses her memory." Donna said.

"Remember the thing out fixed points and points in flux?"

"Yeah." Donna replied.

"Well this is one of those moments where time is in flux. Loses her memory could easily turn into loses her life and all of history could be changed."

"But where is she going?" Donna yelled.

The Doctor spotted a sign for 'Silent Pool'.

"The lake!" he yelled. "She's heading for the lake! What's she doing?"

They drove up just as she was getting out of the car.

"Here I am!" she shouted, holding up the Firestone. "The honey in the trap. Come to me, Vespiform."

"She's controlling it." Luna told them, standing near the car, holding the top of her arm. From where she stood, Donna could see blood trickling from beneath her hand.

"It's mind is based on her thought processes." The Doctor said as they got out, quickly evaluating the injury of his best friend. When he was sure it was nothing to serious, he carried on. "They're linked."

"Quite so, Doctor." Agatha said. "If I die, then this creature might die with me."

"Don't hurt her!" the Doctor shouted to the Vespiform as they ran to Agatha's side. "You're not meant to be like this."

"You've got the wrong template in your head, that's all. Easily fixed if you give me and the Doctor a chance. I promise." Lu yelled, going to the other's side.

"He's not listening." Donna said.

She suddenly grabbed the Firestone out of Agatha's hand and threw it in the lake. The Vespiform dove into the water after it. The water bubbled and glowed purple as the Doctor, Luna, Donna, and Agatha looked on.

"How do you kill a wasp?" Donna asked. "Drown it. Just like its father."

"Donna, that thing couldn't help itself." The Doctor told her.

"In her defence, it could've killed us all. See? If Eddison was reading Sherlock Holmes at the time, this dinner party would've been so much better." Luna said, taking his hand with her spare hand.

"Death comes as the end." Agatha said. "And justice is served."

"Murder at the vicar's rage." The Doctor said.

Luna and Donna rolled their eyes.

"Needs a bit of work." He conceded.

"Just one mystery left, Doctor." Agatha said. "Who exactly are you?"

He was saved from having to answer as Agatha doubled over in pain and the Doctor slowly lowered her to the ground.

"Oh!" he shouted. "It's the Firestone! It's part of the Vespiform's mind! It's dying and it's connected to Agatha!"

Agatha glowed with a purple light that soon faded and she fell into unconsciousness but luckily Luna managed to catch the swooning lady.

"It let her go." Luna said. "It chose to save her life."

"Is she all right, though?" Donna asked.

"Of course!" the Doctor exclaimed. "The amnesia! Wiped her mind of everything that happened. The wasp, the murders…"

"And us." Donna said. "She'll forget about us."

"Yeah, but we solved another riddle-the mystery of Agatha Christie." The Doctor said.

They stood outside the TARDIS, watching Agatha walk away from them.

"The next day, her car gets found by the side of the lake." The Doctor told them. "A few days later, she turns up at a hotel in Harrogate…with no idea of what happened."

Agatha stopped and looked back at them.

"No one will ever know." Luna finished.

Agatha turned back around and finished climbing the steps to the hotel.

"Lady Eddison, the colonel, and all the staff-what about them?" Donna asked.

"A shameful story. Believe me, none of them will ever talk about it until the day they die because they're too British. Afterwards, the Unicorn does a bunch back to London Town… Luckily after the great stink… and she can't tell anybody she was there." The female alien said, linking arms with both of them, a white bandage around her arm. Luckily, it hadn't been too deep but deep enough to leave a mark though she refused to let him use the sonic.

"But what happens to Agatha?" Donna asked.

"Oh, great life!" the Doctor replied. "Met another man, married again. Saw the world. Wrote and wrote and wrote."

"She never thought her books were any good, though." Donna said sadly. "And she must have spent all those years wondering."

The Doctor turned and led them back into the TARDIS.

"Thing is, I don't think she ever quite forgot." The Doctor said. "Great mind like that, some of the details kept bleeding through. All the stuff her imagination could use. Like Miss Marple!"

"I should have made her sign a contract." Donna mourned.

"And-where is it?" the Doctor said. "Hold on…Here we go."

He lifted up a section of the TARDIS floor and pulled out a chest.

"C." he said as he opened it. "That is C for Cyberman."

He put the chest plate on the ground next to them.

"C for Carrionites."

He took out the globe and handed it to Luna. Looking in, she wasn't every shocked to see a lot of old crones in a snow globe but she just shook it a couple of times.

"Looney, do you mind?"

"Fine… but you have to tell me the story behind these."

"You've chosen tonight's bedtime story." He told her, grinning before winking. Giggling, she placed the globe down then dropped a kiss to the top of his head, causing Donna to smile.

He took out a bust of Caesar and set it aside before finding what he was looking for.

"And…" he said, pulling out the paperback. "Christie, Agatha."

He held it up for them.

"Look at that." He said.

It was a copy of Death in the Clouds with a large wasp on the cover.

"She did remember." Donna said.

"Somewhere at the back of her mind, it all lingered." The Doctor said. "And that's not all. Look at the copyright page."

"If it's copyrighted to Donna, we're going back so I can get a piece of the action"

"But, don't you hate her?" Donna asked, confused. The way she spoke about the woman wasn't the most pleasant way.

"I don't hate her… I just think that Sherlock Holmes is a better detective than Poirot."

"Just look." The Doctor told them.

Donna took the book and opened it.

"Facsimile edition." She read. "Published in the year…5 billion?"

"People never stop reading them." The Doctor told the girls. "She is the best-selling novelist of all time."

"But she never knew." Donna said, sighing.

"Well, we never know how we're going to be remembered, do we?"

"We just have to hope for the best. Maybe that's what kept her writing. It's the same thing that keeps me travelling. Onwards?"

Donna smiled.

"Onwards." She replied.

The Doctor looked at Luna who nodded.

"Onwards." She whispered.

He smiled and got up. He pressed some controls and they watched, smiling, as the column began to rise and fall.

Please review.

Love you all