Ducky walks on the beach in the closing moments of the NCIS Season 9 finale.

Gibbs and Ryan come face to face in the Season 9 finale of NCIS, entitled "Til Death Do Us Part."

Who is Gibbs shaking hands with? We will find out in the Season 9 finale of NCIS, entitled "Til Death Do Us Part."

Gibbs (Mark Harmon) and Dr. Ryan (Jamie Lee Curtis) in the Season 9 finale of NCIS, entitled "Til Death Do Us Part."

Gibbs with McGee, DiNozzo, and David in the Season 9 finale of NCIS, entitled "Til Death Do Us Part."

McGee and DiNozzo in "Til Death Do Us Part." The ninth season finale of NCIS airs May 15, 2012.

The three amigos in "Til Death Do Us Part." The ninth season finale of NCIS airs May 15, 2012.

Tony, Ziva and Tim in "Til Death Do Us Part." The ninth season finale of NCIS airs May 15, 2012.

Mark Harmon as Leroy Jethro Gibbs on NCIS. "Til Death Do Us Part" airs May 15, 2012.

DiNozzo and David in the Season 9 finale of NCIS. "Til Death Do Us Part" airs May 15, 2012.

Brian Dietzen as Jimmy Palmer on NCIS.

Ducky and Tony in the Season 9 finale of NCIS.