Person of Interest Sneak Peek: Will Finch Do The Machine a 'Favor'?

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How does one say “no” to The Machine? (Does one?)

Person of Interest‘s Harold Finch (played by Michael Emerson) is met with that quandary in this Tuesday’s episode (CBS, 10/9c), when Root (Amy Acker) pays a visit to the new “Batcave” (spartan as it is) to ask a favor on behalf of Her.

RELATED Person of Interest: Amy Acker Ponders ‘Her’ New Master Plan, Root’s Sexuality

What exactly does The Machine need of her onetime master? Though Root is able to reveal very little in the above sneak peek, I can tease that it involves, among other things, a weapon of significant size. (But to what end?)

Elsewhere in the episode, Fusco goes undercover as a poor schlub in need of a professional “wingman” AKA the latest POI.

Want more scoop on POI, or for any other show? Email insideline@tvline.com and your question may be answered via Matt’s Inside Line.