First aired
October 9, 2018.
Written by
Directed by
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Boom is the 3rd episode of NCIS Season 16 and also the 357th episode of the entire NCIS series.


One of the NCIS agents is starstruck after the team investigates an explosion outside the home of Navy Petty Officer First Class Todd Nicholas and his wife, popular reality TV star Sheba Nicholas while Vance continues physical therapy for the injuries sustained when he was held hostage.

Major EventsEdit

  • It is revealed that Director Leon Vance is being surveilled for unknown reasons by a third party.
  • Due to a Supreme Court ruling deeming using pinging of cell phones, even under the pretenses of an investigation of finding the killer, unconstitutional, the MCRT team was forced to avoid pinging cell phones until they found a workaround.


  • The production code for this episode indicates it was filmed after "Third Wheel" but aired before it.
  • In one scene, the two necklaces that Bishop wears disappear but in the next scene, they're back again.


Series RegularsEdit

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.
Nicholas Torres Wilmer Valderrama Special Agent for the NCIS Major Case Response Team.
Eleanor Bishop Emily Wickersham Special Agent for the NCIS Major Case Response Team
Jacqueline Sloane Maria Bello NCIS Forensic Psychologist
James Palmer Brian Dietzen 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 Chief Medical Examiner for the NCIS Major Case Response Team. Despite being credited, McCallum doesn't appear in this episode.

Recurring CastEdit

Name Portrayed by Role
Kayla Vance Naomi Grace NCIS Director Leon Vance's teenage daughter.
Guy Ross Kent Shocknek ZNN News Anchor.
Westley Clark Scott William Winters
Mallory Madden Dionne Gipson

Other CastEdit

Name Portrayed by Role
Todd Nicholas Cameron Radice Navy Petty Officer First Class.
Sheba Nicholas Tara Holt
Leonard Finnik JD Walsh
David West Zach Tinker Serial bomber
Taylor Hanna Minerva Garcia NCIS Lawyer.
Ava Sharon Gardner Physical therapist.
Walt Fergus Julien Ari
Edie Samples Lana McKissack
Gwen Eisley Sylvia Kwan
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