Well, actually, on that episode's guest star, Jackson Rathbone, better known for his role as Jasper Hale in the Twilight film adaptation. (Fear not, spoilerphobes, no episode specific spoilers will be here, I promise.)
My favourite characters in the Twilight series are the secondary characters, specifically Alice and Jasper (amongst others). I liked Jackson Rathbone as Jasper, but like some others I thought his performance was probably a bit stiff - but given the character as Jasper, and the very little development given to the secondary characters in the film, I was willing to put that down to director/actor decisions to fit into the teeny-tiny film space allocation. That said, I have hoped that the portrayal will be slightly different in New Moon.
Jackson Rathbone was the special guest star in last week's Criminal Minds episode,
Conflicted, and man he blew me away with his performance. Just watching him play the role that he was incredible and I don't doubt that the guy can act, because he acted his pants off. It was fantastic watching him in the scenes with Matthew Gray Gubler - another actor I think is fantastic in his role for four seasons now.
Ultimately, I think this post is my express wish that Jasper is written a lot better in the script for New Moon (and later in Eclipse) because he has the potential to wow audiences if he's given the opportunity to do so.
(Thus concludes my pointless ramblings for now. I'm off to catch up on
Castle, and hopefully watch
The Hitcher before I go to work!)