Mark Harmon and son Sean work together on “NCIS: Origins” and tell Gibbs’ backstory

Pictured (LR): Kyle Schmid as Mike Franks, Mariel Molino as Cecilia “Lala” Dominguez, Austin … (+) Stowell as Leroy Jethro Gibbs and Caleb Foote as Bernard “Randy” Randolf on “NCIS: Origins.” Photo: Greg Gayne/CBS ©2024 CBS Broadcasting, Inc. All rights…