ABBY'S BROTHER IS LINKED TO AN NCIS CASE THAT UNITES THE WASHINGTON, D.C. AND NEW ORLEANS OFFICES WHEN THE PASSENGERS AND CREW ON A PRIVATE PLANE HE CATERED ARE MURDERED, ON A REBROADCAST OF A SPECIAL TWO-HOUR CROSSOVER EVENT ON "NCIS" AND "NCIS: NEW ORLEANS," TUESDAY, APRIL 12

Editor's note: This replaces the previously scheduled programming.

Tyler Ritter Guest Stars as Luca Scuito, Abby's Brother

"Sister City: Part One" - After the passengers and crew of a private plane traveling from New Orleans to Washington D.C. are lethally poisoned, all evidence points to the missing chef, Abby's brother, Luca (Tyler Ritter)
. Gibbs and the D.C. team work in conjunction with Pride and the New Orleans team to locate Luca and determine why a private tech company was targeted, on the first part of a special two-hour crossover event on a rebroadcast of NCIS, Tuesday, April 12 (9:00-10:00 PM, ET/PT), on the CBS Television Network. (Originally broadcast 1/5/16.)

"Sister City: Part Two" - While Special Agent Pride and the New Orleans team investigate a Russian sleeper agent who was involved with Abby's brother, Luca (Tyler Ritter)
, Sebastian flies to D.C. to partner with Abby on the forensics in the case. Also, Bishop drives through the night to deliver a package and work the case with the New Orleans team, on the conclusion of a special two-hour crossover event on a rebroadcast of NCIS: NEW ORLEANS, Tuesday, April 12 (10:00-11:00 PM, ET/PT), on the CBS Television Network. (Originally broadcast 1/5/16.)

NCIS REGULAR CAST:

Mark Harmon (NCIS Special Agent Leroy Jethro Gibbs)
Michael Weatherly (NCIS Special Agent Anthony "Tony" DiNozzo)
Pauley Perrette (Abby Sciuto)
Sean Murray (NCIS Special Agent Timothy McGee)
Rocky Carroll (NCIS Director Leon Vance)
Brian Dietzen (Jimmy Palmer)
Emily Wickersham (Probationary NCIS Agent Eleanor "Ellie" Bishop)
David McCallum (Dr. Donald "Ducky" Mallard)

NCIS GUEST CAST:

Scott Bakula (NCIS Special Agent Dwayne Pride)
Lucas Black (NCIS Special Agent Christopher Lasalle)
Zoe McLellan (Special Agent Meredith "Merri" Brody)
Shalita Grant (Sonja Percy)
Tyler Ritter (Luca Sciuto)
Lev Gorn (Russian Counselor Anton Pavlenko)
Bryan Batt (Blye CFO Dalton Greenbrick)
Cassidy Freeman (Eva Azarova)
Alex Quijano (Blye Head of Security Blake Huxley)
Wendy Davis (Navy Captain Kensington Bloom)
Jamie Gray Hyder (Navy Petty Officer First Class Heidi Orr)
Abraham Amkpa (Navy Petty Officer First Class Feliz Kane)
Ilia Volok (Burly Man)
Samran Chakrabarti (Jenner Blye)

NCIS "SISTER CITY: PART ONE" WRITTEN BY: Christopher J. Waild

NCIS "SISTER CITY: PART ONE" DIRECTED BY: Leslie Libman

NCIS: NEW ORLEANS REGULAR CAST:

Scott Bakula (NCIS Special Agent Dwayne Pride)
Lucas Black (NCIS Special Agent Christopher Lasalle)
Zoe McLellan (Special Agent Meredith "Merri" Brody)
Rob Kerkovich (Forensic Scientist Sebastian Lund)
Shalita Grant (Sonja Percy)
Daryl 'Chill' Mitchell (Investigative Computer Specialist Patton Plame)
CCH Pounder (Dr. Loretta Wade)

NCIS: NEW ORLEANS GUEST CAST:

Mark Harmon (NCIS Special Agent Leroy Jethro Gibbs)
Pauley Perrette (Abby Sciuto)
David McCallum (Dr. Donald "Ducky" Mallard)
Emily Wickersham (Probationary NCIS Agent Eleanor "Ellie" Bishop)
Brian Dietzen (Jimmy Palmer)
Tyler Ritter (Luca Sciuto)
Cassidy Freeman (Eva Azarova)
Tina Benko (Paulina Kurteva)
Samran Chakrabarti (Jenner Blye)
Bryan Batt (Dalton Greenbrick)
Alex Quijano (Blake Huxley)
Ilia Volok (Burley Man)
Alexander Babara (Russian)
Lev Gorn (Russian Counselor Anton Pavlenko)

NCIS: NEW ORLEANS "SISTER CITY: PART TWO" WRITTEN BY: Christopher Silber

NCIS: NEW ORLEANS "SISTER CITY: PART TWO" DIRECTED BY: James Hayman