Mark Harmon Spotted For The First Time Since Shocking Exit From 'NCIS' After 18 Seasons OK! Magazine 29 Oct 2021 Special agent Leroy Jethro Gibbs hung up his badge earlier this month after 18 seasons.
Mark Harmon's Exit From 'NCIS' Had 'Been In The Works For A While': Actor Was 'Worn Out By The Daily Grind', Says Source OK! Magazine 24 Oct 2021
Mark Harmon Exits 'NCIS' After 18 Seasons, Showrunner Steve Binder Hints 'Never Count Leroy Jethro Gibbs Out' OK! Magazine 12 Oct 2021