NCIS
Rule 91
TV Flash files “Rule 91” as the last listed hour of season 18 — NCIS (2003–present) on CBS, season 18, episode 16, aired 2021-05-25, 60 min.
From the desk
How this hour is filed
This leaf is S18E16: listed hour 414 of 508 in the NCIS guide, last listed hour of season 18. It aired 2021-05-25 (60 min). The listed hour before it is “Blown Away” (S18E15). Next is “Blood in the Water” (S19E01). Broadcast log — titles and dates, not a plot bible.
Catalog log
Broadcast listing — not a TV Flash recap.
While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak. Also, Gibbs and Marcie realize the killer they've been tracking may be onto them.
Viewer FAQ
Where does Rule 91 sit in the NCIS guide?
S18E16 is listed hour 414 of 508 — last listed hour of season 18, season 18 episode 16.
When did NCIS S18E16 air?
Rule 91 aired 2021-05-25 and is listed at 60 minutes.
Do I need JAG before NCIS?
It launched via backdoor pilot episodes on JAG, but the mothership plays as its own squad-room ritual. Start with Gibbs's team, not a homework assignment.
In the series
Why this series still plays
Naval Criminal Investigative Service agents solve military-linked crimes with found-family banter and Gibbs's rules. Mark Harmon became a quiet ratings titan; the squad room is the serialized story. Sturdy CBS comfort that outlived fashion and multiplied into a carrier group of spinoffs.
Gibbs's rules, a squad room that is a second home, and a fandom that will fight you if you call it uncool — welcome to the quiet ratings titan the group chat pretends not to respect until someone dies in the bullpen. (Spoiler fence: mild. The team can bleed.) Donald P. Bellisario and Don McGill's CBS series premiered September 23, 2003, after a *JAG* backdoor pilot, and became a flagship with well over twenty seasons. Mark Harmon as Leroy Jethro Gibbs for many years; Michael Weatherly's DiNozzo, Pauley Perrette's…
Filed against
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- Pauley Perrette as Abby Sciuto
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- David McCallum as Donald 'Ducky' Mallard
David McCallum’s Illya Kuryakin made The Man from U.N.C.L.E. multinational cool — 1960s catalog gadget briefcases, Bond fever’s television wing, then NCIS stretching the blond into Gibbs-adjacent lab weather. TV Flash files him as the…
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- Sean Murray as Timothy McGee
Sean Murray's Timothy McGee grew up inside NCIS as squad-room found family — Naval Criminal Investigative Service agents, military-linked crimes, Gibbs's rules, Mark Harmon as a quiet ratings titan. Sturdy CBS comfort that outlived…