Mark Harmon is returning
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Mark Harmon, who spent 18 seasons on "NCIS," is reprising his role as special agent Leroy Jethro Gibbs for a crossover event.
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‘NCIS: Origins’ Team Previews David McCallum Tribute: Gibbs & Ducky’s Connection, Easter Eggs & More
This will be Stowell’s first episode working with Campbell; the actor played young Ducky in four NCIS episodes, and on the mothership, young Gibbs was played by Sean Harmon (who is an exec producer on Origins ). “Ducky is undeniably charming, able to win over the grumpiest of grumps,” notes Stowell.
"NCIS" alum Michael Weatherly and Cote de Pablo return as Anthony "Tony" DiNozzo and Ziva David in the new Paramount+ series "NCIS: Tony & Ziva."