Gibbs’ Marriage To Diane Is His Longest NCIS Lie

NCIS’ canon dictates that Gibbs and Diane get married, although it’s NCIS: Origins that fleshes out their story by revealing the specifics of their relationship. When she was introduced to the mothership, she and MCRT’s then-leader clearly had an icy dynamic, which made sense, considering Gibbs’ struggles when it came to personal relationships. Diane chalked their eventual divorce to her ex-husband’s inability to move on from his first wife, Shannon, which rang true, until NCIS: Origins started setting up Gibbs and Lala’s romance.

During a rare moment of vulnerability during their time in Washington DC, Diane admitted that she left him because it was difficult to constantly be with someone who couldn’t move on from his ex-wife. But while she was convinced that Gibbs was unable to move on from Shannon, he was actually having feelings for Lala instead. To make matters worse, Diane also confessed that Gibbs was her Shannon — meaning that she was never really able to move on from him.