David McCallum as Dr. Donald "Ducky" Mallard, Sean Murray as Special Agent Timothy McGee, and Pauley Perrette as Forensic Specialist Abby Sciuto in the 200th episode of "NCIS" titled, "Life Before His Eyes."CBS/Cliff Lipson - Friday, February, 3, 2012, 11:3 PM

Mark Harmon as Special Agent Leroy Jethro Gibbs and Muse Watson as Mike Franks in the 200th episode of "NCIS" titled, "Life Before His Eyes."CBS/Richard Foreman - Friday, February, 3, 2012, 11:3 PM

Mark Harmon as Special Agent Leroy Jethro in the 200th episode of "NCIS" titled, "Life Before His Eyes."CBS/Sonja Flemming - Friday, February, 3, 2012, 11:3 PM

Mark Harmon as Special Agent Leroy Jethro Gibbs, Darby Stanchfield as Shannon, and Sam Schuder as Kelly in the 200th episode of "NCIS" titled, "Life Before His Eyes."CBS/Richard Foreman - Friday, February, 3, 2012, 11:3 PM

Brian Dietzen, David McCallum, Pauley Perrette, Mark Harmon, Sean Murray, Cote de Pablo, and Michael Weatherly attend CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.Mark Davis/Getty Images - Friday, February, 3, 2012, 11:3 PM

Pauley Perrette attends CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.John Shearer/WireImage - Friday, February, 3, 2012, 11:3 PM

Cote de Pablo attends CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.Mark Davis/Getty Images - Friday, February, 3, 2012, 11:3 PM

Pauley Perrette attends CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.John Shearer/WireImage - Friday, February, 3, 2012, 11:3 PM

Pauley Perrette, David McCallum, Brian Dietzen, and Sean Murray attend CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.CBS/Michael Yarish - Friday, February, 3, 2012, 11:3 PM

David McCallum, Mark Harmon, Pauley Perrette, and Brian Dietzen attend CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.John Shearer/WireImage - Friday, February, 3, 2012, 11:3 PM

Pauley Perrette attends CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.CBS/Michael Yarish - Friday, February, 3, 2012, 11:3 PM

Pauley Perrette and David McCallum attend CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.John Shearer/WireImage - Friday, February, 3, 2012, 11:3 PM

President of CBS Entertainment Nina Tassler, Executive Producer Gary Glasberg, Mark Harmon, and President of CBS Television Studios David Stapf attend CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.CBS/Michael Yarish - Friday, February, 3, 2012, 11:3 PM

Members of the cast and crew attend CBS' "NCIS" celebration of their 200th episode on January 3, 2012 in Valencia, California.CBS/Michael Yarish - Friday, February, 3, 2012, 11:3 PM

The celebration of the 200th episode of "NCIS."CBS/Michael Yarish - Friday, February, 3, 2012, 11:3 PM

The cast of "NCIS."CBS/Brian Bowen Smith - Friday, February, 3, 2012, 12:3 AM

Cote de Pablo stars as Ziva David in "NCIS."CBS/Matt Hoyle - Friday, February, 3, 2012, 12:3 AM

The cast of "NCIS."CBS/Brian Bowen Smith - Friday, February, 3, 2012, 12:3 AM

Sean Murray stars as Special Agent Timothy McGee in "NCIS."CBS/Matt Hoyle - Friday, February, 3, 2012, 12:3 AM

The cast of "NCIS."CBS/Matt Hoyle - Friday, February, 3, 2012, 12:3 AM

The cast of "NCIS."CBS/Brian Bowen Smith - Thursday, January, 12, 2012, 10:12 PM

Mark Harmon stars as Special Agent Leroy Gibbs in "NCIS."CBS/Matt Hoyle - Thursday, January, 12, 2012, 10:12 PM

Cote de Pablo stars as Ziva David in "NCIS."CBS/Matt Hoyle - Thursday, January, 12, 2012, 10:12 PM

Brian Dietzen stars as Jimmy Palmer in "NCIS."CBS/Matt Hoyle - Thursday, January, 12, 2012, 10:12 PM