The protagonist of 19 seasons of "NCIS" returns to his character's origin story.The NCIS-verse has expanded, and Mark Harmon is still along for the ride.CBS announced in January that a sixth spinoff series of the long-running military-police procedural was on its way,

NCIS: Origins isn't just exploring Gibbs when he was younger — the prequel also features Mark Harmon reprising his role as the present-day version of the character. During a panel discussion with reporters on Thursday 19,

It’s not supposed to be about old Leroy Gibbs — this is about his younger self coming up in the Naval Criminal Investigative Service — but Mark Harmon will appear in the premiere episode of NCIS: Origins.