THE COUNTDOWN ON A MYSTERIOUS VIRUS CAUSES THE MACHINE TO MALFUNCTION JUST AS THE POI TEAM TRIES TO LOCATE AN ELUSIVE MILLIONAIRE WHOSE NUMBERS COME UP, ON "PERSON OF INTEREST," THURSDAY, MAY 2

Carrie Preston, Amy Acker, Sarah Shahi, Brett Cullen, Jay O. Sanders and John Nolan Guest Star

"Zero Day" - Reese and Finch realize that a virus has rendered The Machine erratic, causing it to issue numbers irregularly. As they race against the viral countdown, the team searches for a tech millionaire so elusive no one has ever seen him. Also, Detective Carter's mission to bring Cal Beecher's murderer to justice lands her squarely within the sights of the HR criminal organization, on PERSON OF INTEREST, Thursday, May 2 (9:01 - 10:01 PM, ET/PT) on the CBS Television Network. Carrie Preston, Amy Acker, Sarah Shahi, Brett Cullen, Jay O. Sanders and John Nolan guest star.

SERIES REGULARS:

Jim Caviezel (Reese)
Michael Emerson (Finch)
Taraji P. Henson (Detective Carter)
Kevin Chapman (Detective Fusco)

RECURRING CAST:

Carrie Preston (Grace Hendricks)
Amy Acker (Root)
Sarah Shahi (Sam Shaw)
Brett Cullen (Nathan Ingram)
Jay O. Sanders (Special Counsel)
Boris McGiver (Hersh)
Al Sapienza (Detective Raymond Terney)
John Nolan (Greer)

GUEST CAST:

Kevyn Morrow (IAB Detective Ed Solis)
Opal Alladin (Claudia Sugarman)
Carter Gill (Office Drone)
Mike Masters (ESU Captain)
Sydney James Harcourt (NYPD Uniform)

WRITTEN BY: Amanda Segel and David Slack

DIRECTED BY: Jeffrey Hunt

RATING: To Be Announced