(Awesome prompt! I have done another Molly/Doctor prompt, which is here. Thank you so much - I hope you like it!)
The Doctor flung the morgue door open, striding inside and looking around. “Sherlock? I need you! The Zoogonians are attacking - you’re the only one smart enough to help.” he paused. “Sherlock? Are you in here?”
"He’s gone. Can I help you?"
The Doctor turned around. A small blonde woman in a hideous Christmas jumper and long white lab coat stood before him, wringing her hands nervously. The Doctor beamed at her, adjusting his tie.
"Hello! Can you tell me where to find Sherlock?"
"Um, he might be at the Yard, but then again he might be on a case. You don’t want to disturb him when he’s on a case."
The Doctor chuckled. “Yes, I know that all too well!” he glanced around again. “I need him… dash it, I need a companion… this is so inconvenient…”
"A companion?" the blonde asked.
"Yes! My right hand, my left hand, my eyes and ears. Someone to run with, someone to stop me, someone to help me stop this invasion." he froze, then slapped his face with his hand. "THE INVASION! I have an idea!"
The Doctor ran around the lab, looking into beakers and picking up vials of chemicals. He worked swiftly, pouring chemicals and solutions into one big pot. The blonde walked closer, watching him in awe.
"What’s your name?" the Doctor murmured over a pink beaker.
"Um, Molly. Molly Hooper."
The Doctor glanced over her, then went back to his beaker. “Are you smart?”
"I suppose, yes." Molly smiled. "I don’t like to boast, really, but I am smarter than a lot of people." she puffed out her chest, feeling important.
"Brilliant!" the Doctor grinned at her. "Being smart is great, isn’t it?"
"Well, yes, I suppose." Molly beamed.
The Doctor turned back to his work. The pot was now overflowing, glowing green and starting to smoke. He grinned at it.
"Perfectomundo! And I am never saying that again." he looked at Molly. "Do you want to be my companion?"
"What do I have to do?"
"Whatever I tell you."
"So you don’t actually have a plan?" Molly smirked.
"Not as such." the Doctor shrugged. "But would you like to come with me?"
"Um…" Molly glanced around the lab, then took a deep breath. "Yes."
"It’ll be dangerous."
"We might die."
Molly raised an eyebrow. “We might not.”
The Doctor grinned. “Well then! Allons-y, Molly!” he grabbed the pot and ran outside, Molly following close behind him.