"I have to go for a little while" John whispered, resting Casey down on his bed and wrapping her in his blanket, placing a soft kiss in her hair.

"Why?" She whispered, voice breaking, not wanting him to leave her again.

"Because it's my job" He sighed heavily, resting her ankle on his knee, placing a bandage beside him.

"Please don't go."

"I-I...Sweetie, p-please don't break my heart."

Casey teared up and nuzzled into his pillow, preparing herself for the removal of the shard of sharp, broken glass from her ankle. "Ready?" He whispered, preparing to pull the glass. Casey nodded and he pulled the shard out.

She cried out sharply in pain, into the pillow. He hastily wrapped her ankle in a strong bandage before grabbing her tightly in a hug, heart shattered from hearing her cries. He removed the towel from her head and used steri-strips to close the cut, placing a bandage over it.

"There we go, all better" he whispered, rubbing small circles onto her back. Loki hopped onto the bed and crawled beside me, resting while staring at my Uncle. "That wasn't too bad was I-" he stopped mid sentence when he felt her back trembling. "I can't leave you" He murmured suddenly.

"G-Go, it's o-okay."

"No, it's not" He lay beside her for a moment. "I want to know you're okay. I won't leave if you need me."

"I-I'll be fine, it's just a few cuts."

"Cas, sweetheart-"

"Sherlock needs you."

"You need me too-"

"I have Mrs Hudson."

"Sweetie-"

"Just go Uncle John, I'll be fine" She whispered, forcing a smile softly. He held her hand and rubbed his thumb over her knuckles.

"I'll be back very soon" He promised, smiling gently. "I love you darling."

"Come back safe Uncle J" She whispered hoarsely as he exited the doorway.

Moments after the departure of the adults, Karlisle grabbed the bag she had been packing, when a distinct soft tapping filled the halls.

As she slowly creaked open the door, there was Casey Watson, leaning on her umbrella, tapping at her watch. "Now now Holmes, you didn't think you were leaving without a Watson, did you?"

"Cas" Karlisle couldn't resist but laugh softly.

"Are you proceeding to follow them as well?"

"I am my Uncle's niece, of course I am" She laughed light heartedly.

"And I am mine, so therefore I must accompany you on your endeavours."

"God, you sound so much like him" Karlisle laughed, closing her bedroom door.

"Oh dear" She laughed in response, hobbling downstairs after Karlisle, using the umbrella as a walking stick. The keys rustled in the door, and both darted to opposite sides of the house, hiding as Sherlock, John and, the man who was known as 'Lestrade.' While Sherlock fiddled with the keys to the basement, Lestrade caught sight of Casey.

"Oi, Sherlock, who's the lady?" He nudged him, chewing his gum.

"John's Niece, Casey."

"Oh, hello" He waved at her with a smile. She waved back with a small laugh, leaning on her umbrella. "She's lucky she didn't get your looks John" He teased quietly, winking jokingly at her and going inside the room.

"Do you know him?" Karlisle whispered.

"I've seen him before, never spoken to him" She laughed back. While eavesdropping, Mrs Hudson shooed the girls away. As soon as all three men left however, they were hot on their trail.

"Where do you think they ar-"

"The Lab" Casey murmured. She tapped her earpiece. "Alright Siras, What are we looking at?"

"Siras? Who the bloody hell is Siras?"

"An intelligence program. I designed it when I was bored" Casey elaborated as she typed something into her watch. "Alright, we have a lock on location."

"Damn it's handy having a Watson around" Karlisle laughed softly.

"Damn right, Holmes" She responded, laughing.