Person of Interest Casting Scoop: Find Out Which Lost Fan Favorite Is Reuniting With Michael Emerson! Plus, a Sneak Peek

Exclusive! We've also got a sneak peek at tonight's episode of the CBS drama, airing at 10 p.m. We're also sharing two pics of the fan fave in action with Sarah Shahi in the April 1 episode

Ben Linus and Richard Alpert are together again!

Lost star Nestor Carbonell is set to make a guest appearance on Person of Interest, his former costar Michael Emerson's hit CBS drama, E! News has exclusive learned. Looks like they stayed friends off the island!

Carbonell, who currently stars on A&E's Bates Motel, will play Matthew Reed, the POI of the week in the April 1 episode. According to the show's producers, Reed "is a tough, but charismatic criminal prosecutor, who's haunted by a dark secret from his past."

Dark and haunted, just the way we like to see Carbonell on our TV screens!

Carbonell also brought along his dancing shoes as he's getting awfully close to Shaw (Sarah Shahi) judging by these two exclusive pictures we got our hands on. Come on, who remembers the last time they saw Shaw smile like that? And dancing?! Who is this person and what has she done with Shaw?!

Later this month, Carbonell is set to reunite with some of his fellow Lost castmates, including Josh Holloway, Emilie de Ravin, Jorge Garcia and more, when they celebrate the 10th anniversary of the ABC hit series at PaleyFest.

But Carbonell's exciting guest spot isn't the only POI gift we're sharing as we've got an exclusive (and juicy!) sneak peek from tonight's episode, which introduces viewers to the mysterious and charming man, played by Neil Jackson, Finch (Emerson) recruited before Reese (Jim Caviezel). You know we can't resist a good flashback! Prepare to meet (and get a drink with) the anti-Finch in the exclusive clip above.

Person of Interest airs Tuesdays at 10 p.m. on CBS.