Rule 91 is the sixteenth and final episode of NCIS Season 18 and as well as the 414th episode of the entire NCIS series.
This episode also marks the final appearance of Emily Wickersham (Eleanor Bishop).
Synopsis
As the NCIS team pursue a dangerous arms dealer, they're left shocked when Bishop is implicated in regards to the leaking of highly classified NSA documents while Gibbs and Marcie realize the killer they've been tracking may be onto them.
Prologue
Act One
Act Two
Act Three
Vance after Bishop has told him she was the one who leaked the file.
Act Four
Act Five
Major Events
- Bishop resigns from the team and NCIS.
- Rule 91 is revealed to be "Walk away and don't look back".
Cast
Series Regulars
| Name | Portrayed by | Role |
|---|---|---|
| Leroy Jethro Gibbs | Mark Harmon | Ex Special Agent Assigned to NCIS Major Case Response team. (Indefinitely Suspended) |
| Timothy McGee | Sean Murray | Senior Agent for the NCIS Major Case Response Team. Currently in charge. |
| Eleanor Bishop | Emily Wickersham | Special Agent for the NCIS Major Case Response Team. Resigns to work undercover with Odette Malone. |
| Nicholas Torres | Wilmer Valderrama | Special Agent for the NCIS Major Case Response Team. |
| James Palmer | Brian Dietzen | Chief Medical Examiner for the Major Case Response Team. |
| Kasie Hines | Diona Reasonover | NCIS Forensic Specialist. |
| Leon Vance | Rocky Carroll | Director of NCIS |
| Donald Mallard | David McCallum | NCIS Historian. Despite being credited, McCallum doesn't appear in this episode. |
Recurring Cast
| Name | Portrayed by | Role |
| Marcie Warren | Pam Dawber | Journalist. |
| Jessica Knight | Katrina Law | NCIS REACT Special Agent. |
| Odette Malone | Elayn J. Taylor | An old friend of Ziva's. Planning on leading an undercover operation with Bishop. |
Other Cast
| Name | Portrayed by | Role |
| Afrim Murati | Rafael Petardi | |
| Ronda Ellis | Donzaleigh Abernathy | NSA Deputy Director. |