Scott Foley is taking a break from the halls of Seattle Grace to visit Bon Temps, Louisiana.

The Grey's Anatomy guest star, who is expected back on season eight as Henry, has landed a key role on season four of True Blood.

According to Michael Ausiello, the former Felicity actor will take on the role of Patrick, a former army pal of Terry's. Why will this veteran pay his friend a visit?

Come on, you don't really wanna know, do you? We'll find out soon enough, as True Blood returns this Sunday to HBO. Foley will actually show up on the finale and play a major role on season five. Interesting....

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.