THE NCIS TEAM SEARCHES FOR AN ACTIVE SHOOTER AFTER A LOCKDOWN AT A NAVAL HOSPITAL, ON "NCIS," TUESDAY, APRIL 9

"Perennial" - Following an active shooter lockdown at a naval hospital, the NCIS team searches for a suspect who fled the scene. Also, someone from Sloane's past was inside the hospital and is a key witness in the case, on NCIS, Tuesday, April 9 (8:00-9:00 PM, ET/PT) on the CBS Television Network.

REGULAR CAST:

Mark Harmon (NCIS Special Agent Leroy Jethro Gibbs)
Sean Murray (NCIS Special Agent Timothy McGee)
Emily Wickersham (NCIS Special Agent Eleanor "Ellie" Bishop)
Wilmer Valderrama (NCIS Special Agent Nicholas "Nick" Torres)
Maria Bello (NCIS Special Agent Jaqueline "Jack" Sloane)
Brian Dietzen (Dr. Jimmy Palmer)
Diona Reasonover (Forensic Scientist Kasie Hines)
Rocky Carroll (NCIS Director Leon Vance)
David McCallum (Dr. Donald "Ducky" Mallard)

GUEST CAST:

Kate Hamilton (Faith Tolliver)
Brian McNamara (Noah Sykes)
Sam Daly (Virginia State Police Officer Dale Moseby)
Elayn J. Taylor (Odette Malone)
Merrick McCartha (Doctor Eugene Pierce)
Brian Oblak (MPD Cop #1)
Jennifer Carta (Navy Captain Veronica Crawford)
Kyle Grossmeyer (Young Man)
Charlotte Evelyn Williams (Nurse #1)
Roopashree Jeevaji (Doctor)

WRITTEN BY: Gina Lucita Monreal

DIRECTED BY: Tony Wharmby