WHILE CALLEN AND SAM ARE ABOARD THE USS ALLEGIANCE, THE SHIP IS PLACED UNDER QUARANTINE FOR POSSIBLE EBOLA EXPOSURE, ON "NCIS: LOS ANGELES," SUNDAY, OCT. 20

"Yellow Jack" - While Callen and Sam are aboard the USS Allegiance, the ship is placed under quarantine for possible Ebola exposure. Also, Kensi and Deeks investigate the murder of a petty officer who recently departed the USS Allegiance and is linked to the Ebola exposure, on NCIS: LOS ANGELES, Sunday, Oct. 20 (9:00-10:00 PM, ET/PT) on the CBS Television Network.

REGULAR CAST: Chris O'Donnell (Special Agent G. Callen)
LL COOL J (Special Agent Sam Hanna)
Linda Hunt (Operations Manager Henrietta "Hetty" Lange)
Daniela Ruah (Special Agent Kensi Blye)
Eric Christian Olsen (LAPD Detective Marty Deeks)
Barrett Foa (Tech Operator Eric Beale)
Renée Felice Smith (Intelligence Analyst Nell Jones)

GUEST CAST:

Gil Birmingham (Navy Captain Steven Douglas)
Medalion Rahimi (NCIS Special Agent Fatima Namazi)
Wesam Keesh (NCIS Special Agent Ehsan Navid)
Nadine Ellis (Navy Lieutenant Commander Karen Quinn)
Lesley Fera (USAMRIID Colonel Sandra Kaufman)
Kimberley Drummond (Jenny)
Brett Davern (Navy Petty Officer Stephen Lamb)
A Leslie Kies (Navy Lieutenant Junior Grade Leslie Grant)
Siaka Massaquoi (Jenny's Boyfriend)

WRITTEN BY: Andrew Bartels

DIRECTED BY: Terrence O'Hara