Brought this from the previous thread because HellBells made a great point about the Nick/Greg scene: (bolding is mine): You hit the nail on the head with this comment, HellBells, because that's exactly what that scene showed us. Nick could have mentioned Warrick to Catherine, Brass, Grissom, or one of the labrats. But, he didn't do it. Greg is the first person he mentions Warrick to. And this means a lot. Nick trusts Greg , probably because Greg is the only person who really knows how Nick is feeling about Warrick's death.