NCIS: Fans thrilled as 400th episode special details Gibbs and Ducky’s first meeting

After well over a decade on screens, NCIS turned the clocks back to 1980 to finally reveal the moment Gibbs and Ducky first met.

Mark Harmon’s own son Sean stepped in to play his father’s iconic role, while Adam Campbell filled David McCallum’s shoes as a younger version of the forensic expert.

In this milestone episode, it’s revealed Ducky has abandoned his career in medicine working in a refugee camp in Afghanistan, and has started a new life in America.

A strange murder case brings him into contact with Leroy Gibbs, who is just starting to get involved with the NCIS’ precursor, the NIS.