There was only a small hint of the characteristic bounce in Greg's step as he entered the break room in search of caffeine. He poured himself a cup, and pulled out a chair at the table. He knew this must be a particularly bad case because no one had pounced on him yet, demanding to know results. He hated that. It meant they didn't want the results. He took Nick's case file and began looking at the pictures.

"The hair belongs to the mother of your first vic." He said, dropping it as gently as he could.

Sara exhaled sharply, "At least we can tie the two cases together."

Greg squinted at the pictures suddenly, trying to see something clearly. He pulled the pictures out of the file and lined them up on the table. Warrick sat forward abruptly, hoping that Greg would see the pattern that was only just eluding him.

"Green room." Muttered Greg, absently reaching for his coffee. "A big green room, and the moon."

Warrick's eyes grew wide as he finally remembered. "Good night room, good night moon." He recited.

"What are you two talking about?" Sara demanded, somewhat exasperatedly.

"It's a book." Greg explained, "A children's book where the kid says good night to everything in the room."

"What does that have to do with the case?" Nick asked, a glimmer of hope in his voice.

"Well, the first kid had a green room." Greg pointed out.

"And the moon is almost full." Warrick added.

Catherine still looked skeptical, so Greg kept talking. "All of the lights in victim number one's room were on, except for the night light, which was smashed. That's the next line."

"And the second room had those red balloons in it." Warrick said "And that's in the story too. I bet if we ask the mother, she won't remember ever seeing them before."

"Were there prints on the balloons?" Nick asked

"No, but maybe there's something in the air that'll be useful. We'll have to go back to the scene to get them though." Sara said, her face looked slightly apologetic. "I didn't bring them back because nothing showed up when I dusted."

"You followed protocol Sara." Catherine said drawing everyone's attention back. "Greg, go work on that soil sample. Nick, Sara, go get the balloons and do whatever you can with them. Warrick, see if you can't find a few copies of that book. I'll go talk with Grissom."

The group nodded and split up to take care of their assignments. Catherine made her way down the hallway and into Grissom's office. He was at his desk with his head in his hands. The computer screen was off, the lights were dim, and the singing fish did not announce her presence with his usual rendition of "Take Me To The River". Catherine knew Gil Grissom well enough to realize that he was having a migraine.

She walked over to stand beside him and took his hand. He looked up at her and smiled through the grimace of pain on his face.

"You take anything?" She asked quietly, getting only a nod in response, she kept talking. "We'll get him Gil. Greg found us a pattern. We have leads."

He smiled at her again, and she knew she was speaking in vain. She opened her mouth to take another shot, but was interrupted by the sound of two beepers, ringing in unison.

It was Brass.

There had been another one.