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Actor Michael Emerson with an umbrella stands on Main Street as it snows during the Sundance Film Festival in Park City, Utah January 21, 2012. Reuters/Mario Anzuoni

"Person of Interest," or “POI” starring Michael Emerson (Harold Finch), Jim Caviezel (John Reese), Amy Acker (Root) and Kevin Chapman (Lionel Fusco), will air “Q & A” (Season 4, episode 15) on Tuesday, Feb. 17, 2015 from 10:00 p.m. to 11:00 p.m., ET/PT on the CBS Television Network.

This episode is about Claire Mahoney’s (Quinn Shephard) return and how she needs help from Finch. Claire previously appeared in “Nautilus” (Season 4, Episode 2) which was aired on Sept. 30, 2014. She was turned into a Samaritan asset after solving the Nautilus – a series of cryptographic puzzles with a common theme.

Spoiler Alert! This article contains spoilers of the show’s 15th episode. Read only if you want to know more about it.

"Person of Interest" Season 4, Episode 15 “Q & A” is directed by Stephen Semel and written by Dan Dietz. TV Guide reports that in this episode, a young hacker named Claire, who is from Finch’s past comes back to ask for his help. Finch tried to protect Claire from Samaritan before. Meanwhile, Reese will try to protect a mysterious software programmer. And, Fusco will visit a boxing gym as part of his investigation.

“Q & A” will feature several guest stars including Ayana Workman (Receptionist), Bella Dyne (Anna), Helene Yorke (Lauren), Kenneth McCoy (Busy Coder), Patrick Brana (Gym Front Desk Guy), Nick Westrate (Calvin), Kay Tauginas (Alek), Andrew Criss (Referee), Omar Maskati (Naresh), Fiona Choi (Samaritan Tech), Louis Lourens (Samaritan Representative), Derrick Williams (Royce) and John Nolan (Greer). The Internet Movie Database, or IMDb also reports that Ramon Aleman (Wall Of Pain #1), Jonah Coppolelli (Student) and Era Atre (Student) will appear in this episode.

Two videos of “Q & A” were posted on the show’s official YouTube channel. The first video is a preview of the episode which shows the new “POI” that Reese must protect. The software programmer is also a boxing enthusiast and her fight scenes are featured here. The second video offers a sneak peek of the episode. It shows Finch and Reese visiting an Internet company.

Click HERE to see a preview video of “Guilty” from the official website of “POI.” Click HERE to see some photos from the said episode.

Let us know your thoughts on the upcoming episode of "Person of Interest" Season 4. For questions/comments regarding the article, you may email the writer at j.somosot@ibtimes.com.au.

CREDIT: YouTube/Person of Interest

CREDIT: YouTube/Person of Interest

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‘Person Of Interest' Season 4 Recap: Episode 13 'M.I.A.' Aired On Feb. 3, 2015, Reese And Root Deal With Carrow In Maple, New York As They Search For Shaw [WATCH VIDEOS]

‘Person Of Interest' Season 4 Spoilers: Episode 13 'M.I.A.' Airs On Feb. 3, 2015, Root And Reese Travel To New York To Find Shaw