Amy Acker, Person of Interest

Giovanni Rufino/CBS

Person of Interest fans, we've got a treat for you. Or should we say treats?

The CBS hit returns Tuesday, March 18 with an all-new episode, titled "/." So what does "/" mean, you ask? Well, a forward-slash is code for "root path" in the programming world, which means we'll be seeing the return of Root (Amy Acker) in the episode. Can we get a huzzah?!

To celebrate the show's return, as well as Root's reappearance, we're exclusively sharing the opening six minutes of the episode with you. In the episode, Root and Finch (Michael Emerson) clash when they are both assigned the same person by The Machine.

Oh, and Arrow fans will be happy to see a familiar face in our exclusive sneak peek...

Ah, how awesome is it to see Colin Donnell (formerly known as Tommy, Oliver's BFF, on Arrow!) back in action? (It's worth noting that his character Billy is not the person she and Finch are both assigned.) Watch our first exclusive sneak peek above to see why Root is busting Billy out of lockup.

And make sure to check back with us tomorrow morning as we're exclusively giving you part two of POI's opening scene from "/"!

Person of Interest was recently renewed for a fourth season by CBS, who also picked up 17 of its other series, including The Good Wife, Two and a Half Men, NCIS and Elementary.

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

PHOTOS: Renewed, canceled or on the bubble? Find out where your favorite shows stand

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