Disclaimer: I do not own anything Criminal Minds

A/N:First Criminal Minds story, let's see how this goes. There are a few things about the stories that you should consider, though for the most part this story follows Canon, there are a few changes aside from the Werewolf thing. For one thing, Derek and Spencer are adoptive brothers. Spencer's still germaphobic however it's been changed, the how and why will be explained in the story. Also this is based off of my NCIS Werewolf story Fairytale Nights.

This story is set after S5Ep17


Under The Moon

Prologue:

The Wolf was large; dark brown fur thick and gleaming under the moonlight, furry ears and nose twitched as they listened and smelt for its prey. Unique and eerily intelligent green eyes stared down from the cliff that overlooked the forest. A twig suddenly snapped, and bushes rustled, the nightly sounds of the forest went unusually silent. The Wolf stiffened, and its eyes moved searchingly and waited.

Soon, from the thicket, emerged its prey.

Tilting its head back, the Wolf howled, which is soon joined by others; answering the Wolf's call and creating an haunting melody.

Below, the prey, which had moved near the Cliffside where the Wolf was posted; looked up and upon seeing the Wolf snarled and started to scale up with an ease and quickness that shouldn't be possible for its size. Growling, the Wolf leaped; the two collide and fell to the ground. It doesn't faze them as the two roll around, biting and scratching each other. The prey is able to toss the Wolf off it, the Wolf landed on its paws, dirty kicking up as it skid back to a stop. The prey roared, a sound that echoed and scared off birds and other nightly creatures, and charged at the Wolf. The Wolf bared its teeth, and leaped to the side, the prey quickly changed direction. But it wasn't quick enough, the Wolf was able leap and land on his back.

Sharp teeth and nails dug into fur and skin, hanging on as the prey shook and reached, trying to get the Wolf off it. There were howls, and then suddenly dark blurs shot out of the thicket and tackled the prey, the sounds of their fighting, growls, snarls, and barking was all that was heard. Bodies hit the ground, followed by whimpers and yelps, finally there was a loud crack of something breaking and a low whine; then silence.

Panting, the Wolves that had joined the fight, watched the Wolf that kept its jaws tightly around the prey's throat, after a long tense moment the Wolf let go and backed away. Then; where the Wolf once stood, now stood a man, same eerily green eyes stared down at the dead body. A feeling of remorse washed over him.

"They are getting closer" said a female voice to his right.

The man nodded, "We are going to have to warn the other Packs" he then said.

There was a howl in the distance, and the man cursed.