A/N: Hey guys! Sorry, I know this one took two weeks. It was giving me quite a lot of trouble, so I hope you like it. Also, I know it's kind of gross, but looking at this chapter's word, it kind of had to be. Enjoy, and feel free to review or PM me!

5: Muddy- Full of or covered with mud

"This," the Doctor exclaimed as he stepped out of the Tardis with River in tow, "is a mud planet."

"Yes, it is," River breathed as she looked around her.

The planet was covered in black grass that seemed normal except for its color. In various spots throughout the grass, and the entire world, the Doctor had explained, were pools and lakes of mud. Every source of liquid on the planet was mud.

"All of the inhabitants drink mud," he clarified. "They need it like humans need water. They're not the most pleasant creatures, seeing as they bathe in mud… Anyway, come along!"

He took her hand and led the way to a nearby mud lake.

"What do you think? Interesting, huh?" he asked.

"I'd love to go for a swim."

"Really?"

"No."

"Oh."

She laughed and the Doctor started reciting everything he knew about the plane and the various species living on it. It got quite boring after the first twenty-five minutes, and a mischievous smirk began to spread across River's face as an idea struck her.

"Sweetie?" she interrupted, feigning innocence.

"Honey, I was talking, you knew that." She loved when he got irritated.

"Swimming in that-" she pointed at the lake, "-is it… safe?"

"Safe? Well, yes, of course. It's only mud. Why?"

The smirk returning to her face, River grabbed the Doctor by the shoulders and pushed him directly into the lake. He fell back gasping into the thick mud. When he resurfaced, standing in mud all the way up to his shoulders, he was completely covered in it. His hair was matted down and his clothes were soaked.

"River!" he said, not knowing how to react. Should he be exasperated or should he laugh? "I like this bow tie! You know how they do when they get dirty."

"Oh, shut up. I'll buy you a new one. Maybe it won't be as ridiculous."

"Bow ties are cool, thank you very much." He straightened it under the mud.

She started laughing, and it was then that he reached up and grabbed her by the ankle, pulling her in with him. As her head came up from the mud she looked as though she might slap him. Instead, she muttered "I hate you."

"No you don't," he replied, giving her a wink and his biggest smile. "Well then. Now that we're both covered in this filth we might as well go for that swim."

River gave him a look and splashed him. The Doctor splashed back and soon they were both laughing and playing in the mud. He kissed her gently, splashing mud in her hair as he did.

She pulled away immediately. "Oh, I hate you!"

"No you don't!"