1mm is the 6th episode of NCIS Season 18 and the 404th episode of the entire NCIS series.
Synopsis
Following a tip about smuggled weapons, Bishop and Torres engage in a shootout in a former sheriff's residence that's now a historical site, only to find themselves locked in abandoned cells there as Gibbs and McGee race to find them.
Prologue
Act One
Act Two
Act Three
Act Four
Act Five

Trivia
- Bishop and McGee are still hurt from the events of Head of the Snake (NCIS episode).
Cast
Series Regulars
Name | Portrayed by | Role |
---|---|---|
Leroy Jethro Gibbs | Mark Harmon | Special Agent in charge of the NCIS Major Case Response Team. |
Timothy McGee | Sean Murray | Senior Special Agent and second-in-command of the NCIS Major Case Response Team. |
Eleanor Bishop | Emily Wickersham | Special Agent for the NCIS Major Case Response Team. |
Nicholas Torres | Wilmer Valderrama | Special Agent for the NCIS Major Case Response Team. |
Jacqueline Sloane | Maria Bello | NCIS Forensic Psychologist. |
James Palmer | Brian Dietzen | Chief Medical Examiner for the NCIS 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. |
Guest Cast
Name | Portrayed by | Role |
---|---|---|
Michael Hodge | David Carzell | |
Jesse Duncan | Chris Boudreaux | |
Marcus Mayes | Charles Carpenter | Sheriff. |