NCIS backdrop

NCIS S18E16 — Rule 91

8.3

NCIS•Season 18•Episode 16

Rule 91

8.3/10 · 672 votesMay 25, 202145 min

Ranked #3 of 16 in Season 18•+0.5 vs season avg

While pursuing a dangerous arms dealer, the team is shocked when Bishop is implicated in an old NSA leak while Gibbs and Marcie realize the killer they've been tracking may be onto them.

Directed byDiana Valentine

Written byDavid J. North, Brendan Fehily

Previous episodeE15 · Blown Away Next seasonSeason 19

Seasons24

All 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Season 18 Episodes16

Sturgeon Season still

Sturgeon Season

Everything Starts Somewhere still

Everything Starts Somewhere

Blood And Treasure still

Blood And Treasure

Sunburn still

Sunburn

Head of the Snake still

Head of the Snake

1mm still

1mm

The First Day still

The First Day

True Believer still

True Believer

Winter Chill still

Winter Chill

Watchdog still

Watchdog

Gut Punch still

Gut Punch

Sangre still

Sangre

Misconduct still

Misconduct

Unseen Improvements still

Unseen Improvements

Blown Away still

Blown Away

Rule 91 still

E16 8.3Now viewing

Rule 91

Cast8

Mark Harmon

Mark Harmon

Leroy Jethro Gibbs

Sean Murray

Sean Murray

Timothy McGee

Wilmer Valderrama

Wilmer Valderrama

Nick Torres

Brian Dietzen

Brian Dietzen

Jimmy Palmer

David McCallum

David McCallum

Dr. Donald 'Ducky' Mallard

Emily Wickersham

Emily Wickersham

Ellie Bishop

Rocky Carroll

Rocky Carroll

Leon Vance

Diona Reasonover

Diona Reasonover

Kasie Hines

Crew3

D

David J. North

Writer

B

Brendan Fehily

Writer

Diana Valentine

Diana Valentine

Director

Discussion

0 comments

Join the conversation

Share your take and reply to other fans.

No comments yet

Be the first to share your thoughts on this episode.

Episode Summary

"Rule 91" is episode 16 of NCIS season 18. It scored 8.3/10 from 672 votes, ranking #3 of 16 episodes this season (season average 7.8). Directed by Diana Valentine and written by David J. North, Brendan Fehily, it aired on May 25, 2021.

Continue to Season 19 Best of Season 18