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NCIS · Season 23 · Episode 17

NCIS Season 23 Episode 17: Reboot

Aired Apr 21, 2026 60 min CBS
With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside. What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside. What starts as a routine reboot becomes a high-stakes game of cat and…
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Episode Recap

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With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside. What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight.

Quick Answer

NCIS Season 23 Episode 17, "Reboot," aired 2026-04-21 on CBS. With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside. What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight

Quick Facts

Episode Information

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Episode
Season 23, Episode 17 of 20
Title
Reboot
Air Date
Apr 21, 2026
Runtime
60 min
Director
TBA
Writers
TBA

Overview

Episode Summary

With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside. What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight

Gallery

Episode Stills

NCIS Season 23 Episode 17 still

Full Recap

NCIS Season 23 Episode 17 Recap

With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside.

What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight.

At a Glance

Key Moments

  1. With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside (F01).
  2. What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight (F02).

Analysis

Character Development

The NCIS team

What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight Interpretation: the synopsis flags this as the episode's personal beat; no development beyond the synopsis text is asserted.

Cast

Main Cast

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Gary Cole
as Alden Parker
Sean Murray
as Timothy McGee
Wilmer Valderrama
as Nick Torres
Katrina Law
as Jessica Knight
Brian Dietzen
as Jimmy Palmer
Diona Reasonover
as Kasie Hines
Rocky Carroll
as Leon Vance

Cast

Guest Stars

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LL Cool J
as Special Agent Sam Hanna

Special Agent Sam Hanna

Noah Bean
as DOD Chief David Barbado

DOD Chief David Barbado
Josh Banday
as Harold Goodell

Harold Goodell
Geoffrey Arend
as Tommy Manning

Tommy Manning
Regan Aliyah
as Nadine

Nadine
Matt Bush
as Felix

Felix
Frank Gallegos
as Pete

Pete

Lisa Cirincione
as Kate Manning

Kate Manning
Lucas Mazanko
as Joey Manning
Josh Sussman
as Daryl Greco
Shannon Corbeil
as Navy MA2 Anne Swift
Juliana Danielle Ferreira
as Megan Manning

Analysis

NCIS Season 23 Episode 17 Ending Explained

Spoilers below

This section discusses the ending of "Reboot" in detail. Stop here if you haven't watched the episode.

The official synopsis establishes the episode's case and personal beats as summarized above; it does not describe the investigation's conclusion (see source_inventory.failed for the full source situation).

What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight.

FAQ

Frequently Asked Questions

What happens in NCIS Season 23 Episode 17?

With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside. What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight.

What is the main case in "Reboot"?

With most of NCIS away and the mainframe shut down for a midnight upgrade, Kasie and a skeleton crew are left in a darkened building when someone begins hunting from inside.

What else happens in "Reboot"?

What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight.

Is there a personal storyline in this episode?

What starts as a routine reboot becomes a high-stakes game of cat and mouse through powerless hallways until an unexpected ally, Sam Hanna, steps into the fight.

How does the case end?

The official synopsis does not describe the outcome, and no independent recap was retrievable for this episode; the document therefore does not state one.

People

Characters in This Episode

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