Brothers & Sisters is pretty much my favorite show on Sunday nights now (unless Entourage has a strong week)...so I have to tell you, it's been killing me wondering who would be cast as the long lost Ryan Walker (and while first I complained about this story line...it's growing on me)!
EW has found your answer, and though you've probably never heard of him, the role is thisclose to going to actor Luke Grimes (his resume is here).
What do you think? Walker (or bastard-Walker, to be accurate) material)?
Source and image: EW