True Blood Exclusive: Scott Foley Joins Cast as [Major Spoiler Alert]!

True Blood‘s fourth season hasn’t even gotten underway yet and already Alan Ball is making plans for a likely fifth — big plans.

Sources confirm to TVLine exclusively that tube MVP Scott Foley is joining the cast in a major recurring role that will kick off in the Season 4 finale and, assuming the show gets renewed (duh, it will), continue into Season 5.

The Felicity and Unit alum — who spent a good part of last season playing husband to Kim Raver’s Teddy on Grey’s Anatomy — will tackle the role of Patrick, a tough and ruggedly attractive old army buddy of Terry’s (Todd Lowe) who pays him a visit.

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The gig is not expected to derail Foley’s expected return to Grey’s this fall since his TB debut is slated to shoot later this month and the ABC hit doesn’t resume production until July.

True Blood‘s fourth season kicks off this Sunday at 9/8c.

Thoughts? Happy Lowe is getting what appears to be a major storyline — not to mention a new big-name co-star?