All these websites are from IMDB and they include everything from what movies and/or TV shows they've been in to forums about them.

Mandy Patinkin (Gideon) Website

Thomas Gibson (Hotchner) Website

Shemar Moore (Morgan) Website

Mathew Gray Gubler (Reid) Website

AJ Cook (JJ) Website

Kirsten Vangsness (Garcia) Website

Lola Glaudini (Elle) Website

Paget Brewster (Prentiss) Website

Enjoy. :)