Dennis, whose father had been encased in ice, was very cautious about letting a random odd man who called himself 'Doctor' and his friend into his house. But, this Doctor did have his credentials. Truth be told, Dennis didn't even know that the Department of Ice Encasement existed.

And now the duo were in his bathroom, eyeing up his naked father, who was frozen solid. His hands were held spread out in front of him, and pure terror was on his face.

It seemed like this Doctor was a bit more interested in his father than his red-haired friend. She seemed to only like mocking him.

Dennis' wife ran snacks or drinks to the two, which they were starting to depend on, considering they had been observing the frozen man for the last 13 hours. It took a while to actually convince them to sit down and eat. Lydia, Dennis' mother, had accidentally made triple the amount of curry she wanted to, and was glad there were some more people to help get rid of it. However, this Doctor fellow specifically asked for fish sticks and custard. Luckily, Dennis had some extra in his freezer.

"So…" said Dennis' wife after they had all sat down. "Did you figure out what happened to Patrick?"

The Doctor, who remembered he was supposed to be an official of the Department of Ice Encasement, smoothed out his patchwork jacket and licked off the extra custard from his lips.

"I need some details first. Did one of you just happen to walk in and find him like that, or did something prompt you to go in?"

Dennis nervously glanced at his wife before replying.

"I was just walking in with the groceries, and I heard a scream, and I mean a blood chilling scream. I dropped everything and rushed to the hallway, and mum was already in the bathroom with dad. He was covered in ice, and the shower was still spraying on him."

The Doctor cleared his throat. "You know what, I'm going to exchange some words with my colleague here."

Amelia's full mouth only allowed her to make a few muffled 'mmh-mmh' sounds. Despite this, the Doctor grabbed her sleeve and dragged her out the front door.

The wind was quite severe. They were deep into night, but the streetlights managed to stave off the darkness. The Doctor was briskly walking down the sidewalk, and Amelia was right behind him.

"Dog-" Some curry spewed out of her mouth. She chewed and swallowed before speaking again. "Doctor, what's wrong?"

"I've seen this before, Amy. Except that was years ago. I was taking a vacation in Hiroshima and there were a lot of reports of this…thing happening. People would take drinks of water and then randomly get frozen solid." He waited for a reply of some sort, but he only heard Amelia's footsteps behind them. "I tried to find out what was happening, but, I realized the date was August 6, 1945, and I knew Hiroshima wouldn't be around for much longer." He stopped walking. "But whenever someone got frozen, they always died screaming…"

"O-kay, but why is screaming important?"

The Doctor swiveled and faced Amelia.

"In all my life, I've never seen another race cling to life as much as humans." He swiveled and began walking again. "They're screaming because they have to watch, watch as the ice slowly creeps up their body and cover their limbs, and when they can't struggle, they scream. They scream bloody murder-"

The sonic screwdriver began flashing and whirring. The Doctor pulled it out of his pocket and examined it for a second. After a moment, he scanned the area around him before seeing a manhole cover in the middle of the street.

"That's not good." He ran to the manhole and pulled it off. He kneeled and stared down into the dank, lightless sewer.

"What is it now?" Amelia was beginning to sound like a moody teenager.

"This is serious, Miss Pond!" Amy was taken aback, but the Doctor immediately breathed and continued. "Back in Hiroshima, I thought the ice was a sort of disease, passing from mouth to mouth, but no. There's no way fresh water from the tap could have the 'disease'. It's being put there by something. And since my screwdriver is doing this-" he held up the flashing sonic screwdriver, "-that means that something unearthly is doing it." He rose to his feet. "To summarize, there is an alien contaminating the waterways with ice that kills people, and that water could be traveling to thousands of homes right now."

Amelia's jaw had slowly widened as the Doctor spoke. After his spiel, she looked down at the ladder leading to the sewer.

"So, you're going to go look for it?"

"That's right. But I need one thing." The Doctor kneeled back down. "You need to stay at Dennis' house. Watch to see if his father changes in any way."

And with that, the Doctor started his descent.

It had been about an hour. The Doctor was scanning every which way with his screwdriver, trying to find alien life. When he saw that the water flowing next to him was an unnaturally bright blue, he put away the screwdriver and crept up to the next turn in the sewer. He poked his head around the corner.

There was a creature there, one that most of us on Earth would call Bigfoot or Sasquatch. There was one difference. Instead of hair, the thing had sharp, crystalline shards of ice sticking out of its body.

It was dipping its hand into the water, allowing the ice to be swept away.

The Doctor felt terror swell up in him. "Xeo's."

The creature heard his voice ring throughout the concrete. It quickly jerked up its head and roared. That's the best way to put it, because the sound it made was closer to the shattering of glass. The Doctor turned and sprinted off, as he had done so many times before.

The Doctor climbed back up the ladder to the outside and replaced the manhole cover with urgency. He turned to go back to Dennis' house, but was confused to see Amelia running to him.

"What are you doing?" Amelia replied through exasperated breaths.

"Ice…Patrick…Bigfoot…"

The Doctor didn't listen to any more, he began running again.

Dennis was terrified. Here he was, trying to keep his bathroom door shut because a Bigfoot-like creature had burst out of his father's ice tomb and was trying to kill him.

That's when the Doctor kicked in his front door, immediately rushed over and picked up a bowl of half eaten curry.

"Let it out!" He steeled himself.

"What? Are you crazy?" Dennis yelled at him.

"Yes," the Doctor yelled back, "This has already been explained to you. Now do it!"

Dennis opened the door. A creature almost identical to the one back in the sewers stumbled out, and replicated the sound of shattering glass. On cue, the Doctor flung the curry onto it, and the shattering glass sounds continued as the thing turned fell to the ground and ceased movement.

"Oh my god." Dennis walked over and kicked the monster on the ground. "What the hell is this thing?"

"Technically," the Doctor sighed, "that's your father."