Mark Harmon will always be an integral part of NCIS. The Freakier Friday actor was part of the inaugural cast in 2003, as Special Agent Leroy Jethro Gibbs. And though he left the show in 2021, his legacy has remained steady,

The pair play Tony and Ziva, who are the lead characters in the latest NCIS spin-off series, NCIS: Tony and Ziva. Their characters notoriously have a slow burn relationship, and the pair later have a child together. Coming back to the show, after many years away, meant the actors needed to find their rhythm again.