The Legend Returns: Mark Harmon's Gibbs Breaks Retirement in NCIS: Origins Season 3! The Return We've All Waited For: Mark Harmon's Gibbs Is Back! Stuart's Multiverse Adventure Takes a Bold Turn: Episode 5 Breaks Free From Big Bang Theory Cameos The Unthinkable End: After 46 Unbelievable Seasons, MTV Bids Farewell to a Comedy Titan