Leroy Jethro Gibbs, portrayed by Mark Harmon, is a beloved character on NCIS, known for his stoic demeanor and silent nature. He often gives off the impression of a new girlfriend’s dad you’re meeting for the first time, who hasn’t blinked in 20 minutes.
Throughout the series, NCIS has teased viewers with questions about Gibbs’ life, like how he gets his boats out of the basement and why he once shot McGee. But there’s one secret he couldn’t keep from his colleagues.In the season 16 episode “…and Executioner,” the close-knit team at the Naval Criminal Investigative Service discovers that Gibbs is not just a father figure but also a cold-blooded murderer.