nickngreg | Intro Post w/ Questions

Hi everyone! I'm new to the Nick/Greg fandom, but I've been watching CSI and giggling like mad over Greg for about six months (which probably still makes me new compared to a lot of people...). I started watching because my roommate would watch them while I was on the computer, and I got sucked into it. Hard. I have yet to see all the episodes, and I didn't watch the fifth season (night classes and a VCR with The Thomas Crown Affair stuck in it).

So, I have some questions, because I'm attempting to write a story, and I'm not even sure it would work.

1) Nick being molested by the babysitter. Is this cannon, or just generally accepted in this section of the fandom?

2) Greg was a brunette at the beginning of the series, wasn't he? Or could we call him some version of dirty blond? The pictures make it look like he's got all-over brown hair, but I don't know.

3) Is there any set time that Greg started working at the lab? Any lines like, "You've been here for such-and-such years"?

I'm also looking for a beta, and I'm willing to exchange beta services if needed. I'm a very good beta; if I don't know something, my mother will.

Any help would be appreciated.