ABBY BECOMES A HOSTAGE WHEN SHE TAKES A RARE TRIP OUT OF HER LAB TO TALK TO A PHARMACEUTICAL DOCTOR ABOUT A MURDER CASE, ON "NCIS," TUESDAY, OCT. 20

Tony Gonzalez, Former NFL Player and Studio Analyst for "The NFL Today" on the Network and Contributor for "Thursday Night Football," Guest Stars

"Lockdown" - While visiting a pharmaceutical lab on a murder case, Abby is trapped with no communication to the outside world after armed men take over the building and hold everyone hostage, on NCIS, Tuesday, Oct. 20 (8:00-9:00 PM, ET/PT), on the CBS Television Network. Tony Gonzalez, former NFL player and studio analyst for THE NFL TODAY on the Network and contributor for THURSDAY NIGHT FOOTBALL, guest stars as NCIS Special Agent Tony Francis.

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)

GUEST CAST:

Lucy Davis (Doctor Janice Brown)
Robert Neary (Travis Cook)
Seana Kofoed (CEO Virginia Wilson)
David Tom (Maple)
Marcus Henderson (Stu)
Priscilla Barnes (Mrs. Skalbe)
Ally Maki (Marie Manna)
Nick Gomez (Nicky Jones)
Tony Gonzalez (NCIS Special Agent Tony Francis)
Tatiana Chekhova (Reena Deesie)
Alex Stemkovsky (Bodyguard)

WRITTEN BY: Stephen D. Binder

DIRECTED BY: Bethany Rooney