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Finch and Reese have seen it all. That's what happens when your life is dedicated to saving strangers from certain death.

But on tonight's all-new Person of Interest, the boys are faced with something they've never seen before: a repeat number!

Yes, that's right; someone has come up, for a second time, in Finch's algorithm. But who could this unlucky soul be? Check out ETonline's exclusive clip from tonight's episode to find out!

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