Well Eric mentioned in his most recent fan letters that he responded to that he was coming back for another season of CSI. So he is definitely returning this season, beyond that who knows but I am assuming he probably did another 2 years too if most of the others did. I did not like Greg's hair in the beginning of Season 2...the faux mohawk did not bother me much. I was just watching After the Show, S4, and liked this part...what Nick said: SARA: I would take you and me over Catherine and Greg anytime. (This news startles NICK.) NICK: She's got Greg helping her? SARA: Yeah. NICK: (rationalizing) Well, the only way to learn is by getting out in the field, and if Greg helps find her, I'm okay with that. He is sticking up for his man. Just like when he got turned down for the supervisor position and they gave the new CSI position instead for Greg...shows how unselfish he is when it comes to Greg.