NCIS Database

Boom is the 3rd episode of NCIS Season 16 and also the 357th episode of the entire NCIS series.


As the NCIS team investigate an explosion outside the house of a Navy Petty Officer whose wife is a popular reality TV star with one being starstruck, they soon find themselves racing to stop a possible serial bomber while Vance continues physical therapy for the injuries sustained when he was held hostage.


Act One

Act Two

McGee and Torres in a suspect's apartment.

Act Three

Act Four

Act Five

Major Events

  • 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 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.
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 Cast

Name Portrayed by Role
Kayla Vance Naomi Grace NCIS Director Leon Vance's teenage daughter.
Guy Ross Kent Shocknek ZNN News Anchor.

Other Cast

Name Portrayed by Role
Westley Clark Scott William Winters
Mallory Madden Dionne Gipson
Todd Nicholas Cameron Radice Navy Petty Officer First Class and the husband of Sheba Nicholas.
Sheba Nicholas Tara Holt Navy Petty Officer First Class Todd Nicholas's wife.
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's boyfriend.
Edie Samples Lana McKissack Walt Fergus's girlfriend.
Gwen Eisley Sylvia Kwan
  v - e - dNCIS Season 16
Destiny's Child (episode)Love Thy Neighbor (episode)Boom (episode)Third Wheel (episode)Fragments (episode)Beneath The Surface (episode)A Thousand Words (episode)Friendly Fire (NCIS episode)Tailing Angie (episode)What Child is This? (episode)Toil and Trouble (episode)The Last Link (episode)She (episode)Once Upon a Tim (episode)Crossing The Line (episode)Bears and Cubs (episode)Silent Service (NCIS episode)Mona Lisa (episode)Perennial (episode)Hail & Farewell (episode)Judge, Jury... (episode)...and Executioner (episode)Lost Time (episode)Daughters (episode)