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WHEN A POI IS POISONED, REESE AND FINCH HAVE JUST 24 HOURS TO FIND THE PERSON RESPONSIBLE, ON “PERSON OF INTEREST,” THURSDAY, APRIL 25“In Extremis” – When a luminary in the world of medicine is poisoned, Reese and Finch have just 24 hours to determine the deadly toxin he was given and find the person behind the attack. Meanwhile, Detective Fusco’s past corruption catches up with him when an informant gives the Internal Affairs Bureau the crucial information they need to send him to prison, on PERSON OF INTEREST, Thursday, April 25 (9:01 – 10:01 PM, ET/PT) on the CBS Television Network.CHEAT TWEET: This is 1 bad day at the office! 24 hours 2 save a POI and Fusco may go 2 jail on #PersonOfInterest 4/25 9:01pm ET/PT http://bit.ly/10Mh5MMSERIES REGULARS:Jim Caviezel (Reese)Michael Emerson (Finch)Taraji P. Henson (Detective Carter)Kevin Chapman (Detective Fusco)RECURRING CAST:Robert John Burke (Officer Patrick Simmons)Clarke Peters (Alonzo Quinn)John Fiore (Captain Womack)James Hanlon (Detective James Stills)Louis Vanaria (Detective Azarello)GUEST CAST:Dennis Boutsikaris (Dr. Richard Nelson)Ned Eisenberg (Detective Joseph Soriano)Matthew Humphreys (Brandon Boyd)Gabrielle Miller (Dr. Juliana De Matteo)Matthew Rauch (Dr. Garrett Rossmore)Allison Scagliotti (Molly Nelson)Scott Jaeck (Armand Cochran)Lynda Gravatt (Celia Beecher)Con Horgan (Bartender)Robert Turano (Sergeant)Mark DiConzo (Uniform)Harris Doran (Pork Pie)WRITTEN BY: Greg Plageman and Tony CamerinoDIRECTED BY: Chris Fisher