"Couldn't you have invested in furniture that was a little less… heavy?" Clara groaned as she strained holding the weight of the second sofa. "If you told me this was a bag of rocks disguised as a sofa I would believe you, seriously!"

"What can I say," Ashildr dropped her end on purpose, half due to the weight and half in retaliation at Clara for earlier, "I have expensive taste."

"I can see that," Clara collapsed near the floor, aiming a narrow glare at Ashildr as she strained to push the chair into an acceptable position. She moved round to sit loudly on the plastic sheeting covering the seat as Ashildr disappeared out into the diner. "I guess we're going for the whole minimalistic look in here, then?" she sighed, sitting backwards and resting the base of her head on the upper edge of the dusty plastic after pulling off the chunky grey jumper and throwing it to the side. She straightened her white t-shirt she was wearing underneath.

"At the risk of it turning into what I saw when we went to your, what was it you called it… luxury apartment?" Ashildr called out from inside the diner area, wheeling in the next item of furniture.

"What are you saying about my flat?" Clara remained still, moving her eyes to the side and creasing her features, aware of a vague dull squeaking flooding the space behind her. "What's that noise?" she sat up quickly, twisting around in the seat, "don't tell me you've let mice in over the last three hundred-" Clara stopped suddenly as she identified the source of the noise. She went to say something but stopped herself, hoping the confused look plastered on her face would be enough to express what she was thinking.

"I thought you might appreciate a couple of these," Ashildr offered, rolling a large whiteboard into the space, "to put all of your rules on."

"My rules?"

"You know," Ashildr said, clearly goading Clara, concentrating on moving the board, "don't wander off, expect the unexpected, all of those."

Clara inhaled loudly through her nose, crossing her arms, wanting to retaliate but biting her tongue.

"The Doctor had his chalk boards," Ashildr explained, "so I thought you, as the best teacher in the 21st Century, would appreciate them."

"How do you know about the Doctor's chalk boards?" Clara creased her eyebrows, standing up. "They are in his other TARDIS." She paused for a moment, "did you go in his TARDIS during one of your," she mimicked Ashildr as best she could, "adventures?"

"Actually," Ashildr replied with glinting eyes, preparing herself for Clara's reaction. "I went to a few of his lectures."

"His what?" Clara laughed once. "Lectures? He didn't give lectures. It was probably one of his previous incarnations."

"Definitely your Doctor," Ashildr smirked, stamping her black leather boot harshly down onto one of the wheels to secure the board in a suitable position. "What do you think?" she asked, standing back to admire the new addition. She pushed up the sleeves on her maroon shirt where they had fallen down.

"I think, you're wrong," Clara paced around the central console, "I think you might be getting confused."

"I don't think so. I forget things, but I'm very rarely wrong. I even got you some pens-"

"He was the caretaker at my school for a couple of weeks," Clara twisted a small dial on the console to distract herself, "is that what you mean?"

"What's a caretaker?" Ashildr asked.

"It's a person who cleans and fixes things in a school," Clara explained. "Not a teacher."

"No," Ashildr shook her head tightly, walking away from Clara, knowing enough about her now to know what was going to follow would be an interrogation. "He was stood on some sort of platform with a chalk board, people around him, talking about complicated maths. Or Shakespeare. Sometimes Beethoven."

"When?" Clara faced her, hands on hips.

"That I don't know," Ashildr lied.

"Where?" Clara fired.

"That I also don't know."

"Well," Clara reflected sarcastically, "that is just great." Clara thought for a moment, before letting a wide smile creep over her face. She moved around the console to a small screen, tapping several buttons.

"What are you doing?" Ashildr wandered in her direction.

"I'm checking out your information," Clara didn't react, continuing to manipulate the controls. "If the Doctor was giving lectures I should be able to find him-"

"Stop!" Ashildr interrupted her, suddenly realising she had made a big mistake in telling Clara about the lectures. "Don't look at it! Stop!"

"Why?" Clara turned her head to look directly at Ashildr, hovering her right hand over the search button. "Hang on," she stood up straight, pointing her right hand at Ashildr's face, "you do know! Are you lying to me?"

"No," Ashildr lied. "I just don't think it is a good idea." She walked backwards away from Clara around the console. "I'm trying to protect-"

"Why? I don't need protecting. Why are you lying to me?" Clara paced loudly forwards, trying to keep Ashildr's avoiding gaze. "That's three whys, if I get to five I can't guarantee what will happen."

Ashildr lowered her head, knowing she was going to tell Clara something she didn't want to hear. "He taught at a university for almost a century-"

"Right," Clara said angrily, arms folded, "a bit out of character for him, but say I believe you. Go on."

"His lectures were world famous," Ashildr continued.

"Obviously so world famous I didn't know about them," Clara observed pointedly, "but please do go on."

Ashildr paused to take a breath. "He didn't just stop everything because he forgot you," Ashildr said, turning around to face away from Clara, "you must know that."

Clara reflected for a moment. "Well," she paused, "yes, of course… but-"

"If you press that button," Ashildr indicated the console, "you are going to find out what he does… after you."

"After me?" Clara repeated surprised.

"Like other people he travelled with," Ashildr carried on, "his other faces, travelling companions… wives… a couple of husbands, children... If you press that button, you will find all of that out."

Clara could feel a small tear welling up in her eye. "Wives? Wives, as the plural of wife? He got married again?"

"Yes," Ashildr nodded. "I think I went to one of his weddings."

"And, husbands?"

"He is a she a few times," Ashildr explained, letting out a small laugh.

"The Doctor becomes a woman?" Clara laughed. "I do not believe that."

"Believe it. If he had spontaneously changed into a woman, would you have still travelled with her?"

"I- I- I…" Clara stammered, trying to think of a reply, wiping away the tear she was trying to fight off with her right index finger. "Yes, I guess I would have."

"You guess?" Ashildr smiled, knowing Clara was making the point for her, "or you know?"

"Would have depended what he, or rather… she looked like," Clara thought out loud.

"Only if she was Jane Austen?" Ashildr said playfully, raising her eyebrows.

"How do you know about-" Clara started, blushing, before remembering she had retrieved the book from her flat when they visited two days ago. "Oh, shut up," she said with the smallest grin.

"He doesn't spontaneously change into Jane Austen," Ashildr said deadpan, "I will give you that."

"Shame," Clara laughed once, returning to the screen on the console, inwardly debating over whether to complete the search.

"What I'm trying to say to you," Ashildr asserted, moving to stand on Clara's left, "is you haven't forgotten him. Remember him as you knew him, not what he becomes afterwards. You might not like it."

Clara aimed a glance at Ashildr on her left, still holding her hand over the button. She bit her lip as she tried to reason with herself. "But I could go and-"

"No, you couldn't," Ashildr talked over, shaking her head, "you can't go and do anything. You know that."

Clara groaned loudly, turning to face away from the console. She walked to the outer rail and leaned forward against it, knowing Ashildr was right.

"Let's agree now," Ashildr remained where she was, "no searching, no interfering, just… adventures."

"Adventures?" Clara repeated. "Is that what we're doing?"

"I've enjoyed the last two," Ashildr reflected. "Certainly beats sitting alone watching the universe die."

"Well, I'm still pretty annoyed you got shopping centre zombies on your first go," Clara sighed resignedly, returning to the console.

"Until I find something or someone else more worthy of my time and attention," Ashildr said blankly, "I guess you're stuck with me. Also… I don't know how to use this thing yet. Holo-Clara refused to show me, and, as you know, the manual is next to useless."

"I'm not sure I trust you enough yet to give you free reign," Clara said slowly. "You have already killed me once."

"I thought we had moved past this?" Ashildr moaned. "I just spent three hundred years saving you."

"OK," Clara nodded to herself, shutting down the console in front of her. "I'm choosing to be ignorant."

"Probably for the best," Ashildr agreed, relieved she had saved Clara from finding out about the Doctor's future. "And I'll try to remember not to mention it again."

"Deal," Clara accepted. "So," she walked away, "these rules eh? Won't write themselves, will they?"