'NCIS': Is Gibbs Leaving the Show After Being Suspended? On 3/17/21 at 6:11 AM EDT NCIS Season 18, Episode 10, titled "Watchdog," was a tense one for fans of Leroy Jethro Gibbs (played by Mark Harmon) as he was forced to turn in his badge and gun to Leon Vance (Rocky Carroll). The special agent had left a dog breeder involved in dog fighting and serial canine murderer hospitalized, leading to Gibbs being suspended. With 2021 already seeing Jack Sloane (Maria Bello) leaving the show, fans are worried that another cast member is on their way out. Over recent years, there have been a number of rumors that Harmon, once the highest-paid actor on TV, would be leaving