Anything that resembles a plot is entirely coincidental. Anything that resembles a Main Coone or a Bengal should not be allowed on a space station.
"Come in, Professor! Do you read me?" yelled Commander Norton. "I need the new formula immediately!"
He hammered the comm button, but Professor Vrill wasn't responding. The commander didn't have time to run all the way to the other side of the ship. Instead, he barked an order for the computer to bring up the visual link to the lab. He'd get to the bottom of this delay.
What he saw was Vrill screaming and staggering about with what appeared to be an angry cat clinging to his face. A small tin dog was scooting to and fro, zapping security officers as they approached. Suddenly, the screen was taken up by a single eye.
"Hello there, Norton! I was wondering when we'd hear from you." The owner of the eye backed up. It was a large, furry cat wearing a floppy hat and scarf.
"Doctor!" snarled Norton. The cat gave a little wave.
"So nice to see you again! You see, after that little incident with the transmogrifier-"
"Doctor, stop this at once!"
"-Leela and I thought we really ought to check on the rest of your operation. You remember Leela?" Behind him, Leela had taken Professor Vrill to the ground and was calmly swatting his face every time he tried to get up.
"Security, report to Lab 3 immediately!" shouted the commander.
"Oh, they've already dropped by, haven't they K9?"
"Affirmative," replied K9 from on top of a pile of red-suited officers. He wagged his tail.
"Anyway, Norton, we couldn't help but notice this vaccine your people have prepared for the natives of this planet." He placed a paw on a tray of vials next to him.
A vein throbbed on Commander Norton's forehead. "That is property of the Uvidian Empire, which we are so generously providing to those savages! There is an epidemic among-"
"But those people down there aren't Uvidians," said the Doctor seriously. "Their immune systems are far more developed than your species', and will adapt in time. What you've made here is pure poison." He looked Norton straight in the eye. "You don't seem the least bit surprised. I take it you knew this would kill them."
Norton didn't respond for a moment, then he gave a curt "Yes."
"Why?"
"Why what?"
"Why murder an entire civilization?" the Doctor demanded.
"The Empire has to expand."
"So why not share the planet with them? They haven't settled over more than twenty-three percent of the land."
"Uvidians do not share space with inferior species! They are barely advanced primitives, we can easily wipe them out!"
"That's no reason to commit genocide!" shouted the Doctor. "Norton, I'm giving you a chance to stop everything. Stop this invasion, get rid of the poison, or-"
"Doctor!" cried Leela running over, "There's-" she tried to hop up onto the counter next to the Doctor but landed on the stuck-out edge of the tray, catapulting the vials across the lab and into Vrill, who had been trying to pull a gun off a security officer. The vials shattered as Vrill ran forward, slipped on a wet spot, and fell backwards into a lab bench, knocking over a rather large stack of vials. Every last bit of poison was spilled.
The Doctor stared for a moment at the mess, then back at Norton. "Never mind."
"DOCTOR-" the commander shouted as the screen went blank. He looked around for another officer to bark orders at, but he was alone. It was a small space station, with only a skeleton crew for the stealth mission. Grabbing a fully-charged gun, he stormed down the corridor. He'd take care of those interlopers himself.
Back in the lab, K9 had interfaced with one of the computers while the Doctor walked purposefully across the keyboard of another. Leela trotted along countertops at the Doctor's instruction, using a hose connected to a tap to dilute the poison and make it useless.
"They were really going to inject that into the people below?" she asked around the hose in her jaws.
"Yes. A senseless waste of life," muttered the Doctor. "They could at least have chosen a planet that wasn't inhabited. K9, have you finished setting up the link?"
"Yes, Master."
"Excellent!" He typed a few more things into the computer.
After turning off the water, Leela hopped onto K9's back and he trundled across the spilled liquid to where the Doctor was. He tapped a few more keys and jumped to the floor. "That ought to do it. I've swapped out the coordinates for this planet for an uninhabited on in every Uvidian database."
"What about the Uvidians here?" asked Leela.
"Oh, they'll be all right. I've set the station into a password-protected shutdown. They can either stay up here, or take the escape pods to the planet and live down there. Without a power source, they won't be able to do much damage." He started for the door. "Oh, I just remembered-"
At that moment, Commander Norton burst in and tripped over the feline Doctor. He almost caught himself before he slipped on a puddle and landed hard on his back, knocking himself out cold.
"- Leela, you and K9 go wait by the TARDIS. I'll be right with you." The Doctor ran out the door.
A short while later, Leela sat next to K9, scratching behind his ear with her paw. The Doctor came down the corridor, pulling a small cart along by his scarf. "What's that?" asked Leela.
"The transmogrifier. Can't pilot the TARDIS with paws, you know." He pushed the door open and Leela and K9 went inside. The Doctor followed, but was stopped short when the cart bumped up against the threshold of the TARDIS and couldn't roll in.
The Doctor paused and looked from the cart, to K9 over near the console, and back again. "How...?"
Leela shrugged.