NCIS, Season 18

The 18th season of NCIS opens with a shocking bang, then jumps back to an episode last season where Gibbs bizarrely left the squad room in the middle of a case. We stay with Gibbs and discover what mission he was on at the time, as the first several episodes take viewers through that journey, interspersed with standalone cases. Then, we return to the gripping opening scene of Season 18. The 400th episode, which will air second this season, delves into the day Gibbs met Ducky and joined NCIS.