Mark Harmon once discussed the likelihood of appearing in a hypothetical series finale for the long-running ‘NCIS’.

While it was previously announced that Harmon would return as older Gibbs to narrate the series, NCIS: Origins co-showrunner ...

Mark Harmon, who played the 'NCIS' lead Leroy Jethro Gibbs for 18 years, is returning for an appearance on ‘NCIS: Origins’ ...

Play now! In a November 2023 conversation with PEOPLE, Harmon reflected on his tenure on the beloved show and e ...

Austin Stowell recently shared what it was like auditioning for his ‘NCIS: Origins’ role with Mark Harmon in the room.