Mark Harmon Prepares for Dramatic NCIS Return to Save ‘The Show’ Amid Sinking Ratings Mark Harmon may finally be stepping back into the world of NCIS — and fans could not be more excited. With the show facing declining ratings, CBS insiders believe a dramatic return of Leroy Jethro Gibbs might be exactly what the series needs to reconnect with longtime viewers. Harmon’s possible comeback has sparked major speculation online, and fans are already predicting emotional reunions, high-stakes mission