Garth flew across the room, his body hitting the back wall like a rag-doll. The Doctor stroked his burning forehead, before Donna and he immediately ran across the room to the curled up Dar in the corner.
"What the hell just happened?" Donna asked, observing Garth as he radiated a light purple during his transition back to his standard blue.
"He tried to burn my mind but," Garth opened his eyes and slowly moved all his limbs, as if reactivating "You're not feeling too great, are you Garth?"
"Ma'am, sir, I will ask you again to please leave." The disorientated alien announced, stretching out a shaking finger towards Donna's head. She instinctively shuffled backwards, but the Doctor put a hand on her shoulder to tell her that there was no need.
"Garth you're too weak. When I worked out you were a Dar I knew something was up - oxygen doesn't sit well with your species. Any other day you wouldn't have had any problems burning up both of our brains with a single touch. And yet today my mind managed to repel you."
Garth's face was solemn, and he propped himself up against the wall.
"How did you get here? I mean, if this planet's poisonous, why come?" Donna asked, her voice full of sorrow for the being.
"Our species set up a mass excursion programme in the hope of finding other habitable planets. We were aware of a planet in this galaxy that would be suitable."
"Venus?" The Doctor asked.
"Sol II, yes. Unfortunately the transmitter was programmed incorrectly and I arrived here. I landed in the recreational grounds not too far from here. Mrs. Henderson was sat on the bench and took me in."
"And she wasn't freaked out by some giant smurf landing from nowhere?" Donna asked sarcastically. The Doctor gave her a frown. "What? He did try to kill you."
"Mrs. Henderson was OK. She...had her reasons."
"Why are you still here though? Can't your friends zap you back home?" Donna said, her face full of confusion.
"I...lost my communicator." Garth's multiple eyes darted around the room.
"Or..." The Doctor pushed.
"It is fair to say I have become fond of this planet and its inhabitants. Mrs. Henderson has treated me with care, more so than I had ever experienced previously."
"But you're dying," The Doctor said forthright.
Donna's ears pricked up as she heard a loud click behind them. She swivelled her head to see an elderly lady, dressed in a pink nightgown, pointing a shotgun at them. The Doctor and Donna immediately put their hands up.
"Woah, woah, we're not doing anything. Garth, please, tell her." Donna said, looking down at the slightly more energised alien. After what seemed like far too long he nodded at Anne.
"They were leaving, ma'am. They meant no harm."
"You dare tell a soul, and I won't be so lenient." Donna struggled to comprehend these words coming from a heavily armed elderly lady.
The Doctor and Donna, with their arms still high up, left through the front door, sighing heavily after it shut abruptly behind them.
"Far too many grannies around with 'Winchesters' nowadays." The Doctor said. Donna stared at him in utter confusion.
"So...what do we do?" Donna asked as they made their way back to the TARDIS.
"The way I see it we have two options- leave him or take him back home, more than likely against his will."
"Three options," Donna corrected. The Doctor stared at her quizzically, with a subtle sense of not liking being outwitted. "There's always UNIT." The Doctor's face sank.
"As much as I've relied on UNIT on several occasions before they're not going to look after an alien too well."
"Why not? I mean, there's Martha. She's seen this stuff before, she'd make sure they did all they could, invented some breathing...thing or something. You've got to give them a try."
"I think we should convince him to go home. It's the best for everyone." The Doctor said sternly, somewhat ignoring Donna. She gave him an icy stare.
They had reached the TARDIS by now, and the Doctor slowly unlocked the door, shrouded in utter silence. Donna stood with her arms crossed, looking everywhere but at the Doctor. When the door clicked open Donna immediately stormed in, pushing the Doctor out of the way.
"This is going to be a fun few days." He sighed, entering slowly after her.