"Didn't I tell you not to scream?"

"Yes, well, it's not every day you're being chased by a carnivorous cloud!"

"To be fair..." the Doctor spoke while he panted and they hid behind a fern, "it's not carnivorous. It eats nearly everything."

"Well, that makes me feel better!"

"It's not my fault you had to be all charging in and guns blazing. I had it under control. Oh, look at me. I'm Torchwood. I protect the Earth and blunder about like a prat. La, la, la."

"You are such a strange man. And we don't blunder about."

"What would you call what just happened back there?"

"Losing my boyfriend and being chased by a cloud, that's what I'd call it."

"You're so observant."

"I didn't hear you come up with any brilliant plan."

"So, now you've decided to trust me?"

"It's not as thought I have much choice." The Doctor crossed his arms and smiled.

"Humans. You can never make up your mind."

"Keep talking like that and I'll make sure that whatever you thought of as humanoid before isn't afterwards."

"Threatening me? Now that's cheeky."

"You don't know me very well."

There was a scream in the distance. It was a cross between a yell and the sound of two cougars bashing each other about during mating season. Lisa and the Doctor both thought of Ianto at the same time and half crouched, half ran towards the noise. The words were getting darker.

They came to clearing and found nothing. No bones, no sign of disturbance of any kind.

"Well, the cloud didn't come this way."

"Not true." The Doctor used his sonic screwdriver and moved the beam across the floor of the small clearing. "There is residue from this species immune tract all over the place."

"And what is that then?"

"The only thing to warn us that the cloud has come back."

To be continued...

Prompt 53: Earth