Mark Harmon left NCIS after over 400 episodes on the show.

Gary Cole was introduced into the show upon Harmon’s exit.

Harmon made his final appearance on the show as Leroy Jethro Gibbs in episode four of season 19.

Gibbs’ exit from the show brought on some unexpected changes to the characters.

Gibbs’ absence from the show was still felt a month after his exit.

Harmon’s name still being on the opening credits made fans believe that he would be returning to the show.

Fans commented and shared their speculations on social media.

The showrunner released a statement on the evening of Gibbs’s final episode.

Fans believed that the statement hinted at Harmon’s reappearance on the show.