REESE PROTECTS A SOFTWARE PROGRAMMER WITH A MYSTERIOUS SECOND LIFE, BUT IT'S UNCLEAR WHICH SIDE OF HER LIFE THE THREAT IS COMING FROM, ON "PERSON OF INTEREST," TUESDAY, FEB. 17

"Q & A" - Reese tries to protect a software programmer with a mysterious second life, but it's unclear which side of her life the threat is coming from. Meanwhile, Claire, a young hacker who Finch tried to protect from Samaritan, reaches out to him for aid, on PERSON OF INTEREST, Tuesday, Feb. 17 (10:01-11:00 PM, ET/PT) on the CBS Television Network.

REGULAR CAST:

Jim Caviezel (John Reese)
Michael Emerson (Harold Finch)
Kevin Chapman (Lionel Fusco)
Sarah Shahi (Sameen Shaw)
Amy Acker (Root)

RECURRING CAST:

John Nolan (Greer)
Quinn Shephard (Claire)

GUEST CAST:

Bella Dyne (Anna)
Ayana Workman (Receptionist)
Nick Westrate (Calvin)
Helene Yorke (Lauren)
Omar Maskati (Naresh)
Kay Tauginas (Alek)
Andrew Criss (Referee)
Patrick Brana (Gym Front Desk Guy)
Derrick Williams (Royce)
Kenneth McCoy (Busy Coder)
Fiona Choi (Samaritan Tech)
Louis Lourens (Samaritan Representative)

WRITTEN BY: Dan Dietz

DIRECTED BY: Stephen Semel