As of the present, NCIS Season 21 is still underway, and there is no indication of the series facing cancellation. Despite not being the network’s top performer, NCIS maintains robust live ratings and enjoys popularity in syndication.
Its success in the Monday 9 p.m. ET/PT timeslot, competing with Monday Night Football, has proven advantageous for CBS. Given its role as the flagship series with the potential for spin-offs, it seems improbable that CBS would opt to cancel NCIS, especially when compared to other underperforming shows on the network. The ongoing strike is primarily impacting scripted shows, and as of now, NCIS Season 21 remains unaffected.