Author's Note: This is a FanFiction I came up with a long time ago. Every chapter is pretty much a one-shot (unless it needs to be expanded upon). And every chapter has a different Crossover. Heroes, Once Upon a Time, Sherlock, Merlin, the Avengers, just to say a few examples. It's not in the Crossover category because every single one will be different. However, this first one has no crossover, because it has to introduce you to (a) new character(s).

Who knows? It may even cross over the Doctor's timeline too! (I'm not educated in Classic Who however, so they'll probably get extremely neglected sorry)

Also, it won't really have a story arc or a story line like the TV show ("Bad Wolf" anyone?), just little adventures. And it will only be updated whenever I'm inspired because I write a lot, but I've been hitting a really bad low lately. Sorry if I post one chapter one day, and then the next the next day, then don't for a couple weeks/months. The Chapter Title will usually be the Crossover. Like as not the previous one won't lead into the next... but since this is the first time... it will

Post-Whenever-Clara-Leaves. AU. No idea what Capaldi's Doctor is going to be like (I guess I should mention I'm using 12...), so I'm making something up.

Cassodembreankia, Cass for short, ran away from Gallifrey one hundred years ago. Unwilling to make the promise and take on a title, the Time Lords looked into her future and made one for her. The Destroyer. A feisty but compassionate Time Lady, she was afraid of what her future would bring upon her. She ran because she was afraid. She didn't want to destroy anyone!

She sat alone in a coffee shop. She was allergic to human caffeine (as she'd found out about seventy-five years ago), but this particular one had delicious muffins. She watched human patrons come and go. Always in a rush they were. Never stopped to smell the roses. She didn't either, but she was still young. Three-hundred-and-nineteen wasn't considered young by other Time Lords, but she still thought of herself as young. And the humans said young people could never sit still. Her leg jiggled and her foot tapped and her jaw munched constantly. Her hands were straightening everything. The utensils, the paper towel, the muffin wrapper.

Something unexpected registered in the back of her ears. A metallic thrumming coming from the back of the little shop. She instantly perked up. That was the sound of a TARDIS with its brakes on! A head poked around the door. Graying hair, hazel eyes, stern, waspish face. The rest of the Obviously-Time-Lord came round the wood. Tall, sort of gangling, and completely familiar. The face was new, but the ego and something else radiating from him was familiar. Cass leapt out of her booth.

"Doctor!" she exclaimed. The Time Lord in the magician-like outfit turned and saw her.

"You're not little Cass I met all those centuries ago back home who was terrified of what the Council saw in her future are you?" he asked, taking a seat at her booth opposite her. She sat too and nodded.

"It's me!" she told him. He leaned across the table and patted her shoulder.

"It can't be you. She was a tiny little thing with an attitude problem."

"Look Doctor! You can see I haven't regenerated once since the last time we met. It. Is. Me." Her odd, gold-amber eyes flashed dangerously.

"There's that spirit that you sassed me with," he commented with a smile. She shot him her most cheeky grin. "Okay. It's you. You really haven't changed much." Cass' head cocked to the side, her extremely thick bronze hair falling off her shoulder.

"You have," she observed, her tone less bright. She put her finger under his chin and pushed his head up so she could see his eyes better. "Your eyes. Their older. They're... hurt." He gave her a small, slightly forlorn grin.

"I just lost a good friend. A human girl very dear to me," he explained.

"Another one of your companions?" Cass asked. The Doctor nodded. "I'm sorry."

"It doesn't matter they always come and go. No one can travel for long."

"Trust me, Doctor, I understand. I tried to travel with humans. But all the ones I picked got lodged in my heart and it hurt to see them go. I've spent the past few decades travelling on my own," Cass remarked.

"Cass... would you like to come with me? We're both Time Lords. We can run for a while," the Doctor offered.

"'Run'?" Cass inquired. Her face was innocent. Somewhere between 16-21 human years.

"Travel," the Doctor clarified. Cass grinned.

"Neither of us want to be lonely anymore," she commented. The Doctor gave her a small, mischievous grin - much like the one one of his previous faces had given her back when they first met. Which face was it? She wanted to say Eight or Nine. Had he even told her? Half of her mouth quirked into a half-smile and she grabbed her long black trench coat from where it rested next to her. "I'm totally in."

The Doctor helped her shrug into said overcoat. She tied the sash around her waist and did up the four or so buttons. "I'm glad. This should be fun."

"I'm glad to. Your TARDIS or mine?" Cass pulled a book out of her bigger on the inside pockets. The Doctor looked at it in confusion. Cass smiled. "My Chameleon Circuit still works." The Doctor smiled.

"How about mine?" he suggested. Cass chuckled. "It's easier to get into."

The two stole quietly to the back room where the big blue box was parked. It started to Vworp. "Crap!" The Doctor exclaimed. "I forgot to put the proper brakes on!" He ran to the box before it completely disappeared and jumped in. Slowly the thing pulsed back into existence. The Doctor poked his head out. "Or, you know, you can stay here and watch telly."

"Not gonna happen Mister," Cass joked. She followed him in. "Where to first?"

The Doctor stared at the central control console. He sighed before beaming. "I have just the place!"