NCIS fans are speculating that Mark Harmon's character Gibbs might return to the show, with many believing Michael Weatherly's recent social media posts suggest he may also be making a comeback as Tony DiNozzo. After sharing a throwback photo from his NCIS days and posting a video in which he appears to be back in character questioning a Christmas tree, fans have taken this as a sign that something big is happening on the show. Although nothing has been confirmed yet, fans can't help but hope for the epic reunion of Gibbs, Tony, Ziva, and a grown-up Tali.