Mark Harmon, best known for his role as Leroy “Jethro” Gibbs on the hit CBS show NCIS, has signed on for two more seasons (15 and 16) of the show. CBS announced earlier this week it extended the show for two more seasons, with Mark Harmon signing a two-year deal of his own.

.@NCIS_CBS Renewed for Seasons 14 AND 15 https://t.co/JfmPfHvVp5 pic.twitter.com/N1waZaitxK

— TVLine.com (@TVLine) February 29, 2016

NCIS will undergo a huge change at the end of this season with the departure of Michael Weatherly. He has played the role of Special Agent Anthony DiNozzo since the show’s first season, back in 2003.

CBS Renew/Cancel standings, week 23: ‘NCIS’ is forever, or as long as Mark Harmon wants it to be https://t.co/kWZKqCJ47w

— TVbytheNumbers.com (@TVbytheNumbers) March 1, 2016

In addition to Mark Harmon and Michael Weatherly, NCIS stars Sean Murray, Pauley Perrette, David McCallum, and Rocky Carroll.

Are you an NCIS fan? Do you believe the show would survive if Mark Harmon hadn’t signed a new contract?

It will be difficult enough for fans to watch NCIS without Michael Weatherly’s character. A Mark Harmon departure would likely mean the end of the show.