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October 20, 2011 at 03:38 PM EDT

An X Files veteran and former Seattle Grace bigwig is signing onto TNT’s Dallas.

Mitch Pileggi has joined the show for a multi-episode arc playing Harris Ryland, owner of Ryland Trucking and Shipping. He’s described as an “alpha male” and Ann’s (Brenda Strong) ex-husband.

Since his role as FBI Assistant Director Walter Skinner on X Files, Pileggi has been the king of multi-episode arcs on hit series. He’s had stints on Sons of Anarchy, Supernatural, Medium, and Grey’s Anatomy. TNT’s Dallas was recently rocked by the news that co-star Larry Hagman has been diagnosed with cancer. But the actor best known for the original 1980s version of Dallas is still expected to participate in new show, which is set to premiere next summer. If you haven’t yet seen the Dallas trailer, you can find it here.

Read more:

Larry Hagman has cancer, still plans to do ‘Dallas’

TNT’s ‘Dallas’: New cast photos!

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