Sound Off (episode)

Sound Off is the 13th episode of NCIS Season 17 and the 391st episode of the entire NCIS series.
==Synopsis==
After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident while Palmer carefully interviews medical assistant candidates.
==Prologue==
==Act One==
==Act Two==
==Act Three==
==Act Four==
==Act Five==
==Major Events==
*Jimmy begins looking for an assistant.
==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 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
Diana Murphy 	Katie Leclerc 	Marine Staff Sergeant who is also deaf and the ex-girlfriend of murdered retired Marine Gunnery Sergeant Daniel Backer.
Edison Geary 	William R. Moses 	
George Ingram 	David Burke 	The killer.
Christopher Crane	Peter Graham 	
Zahir Najjar 	Amir Korangy 	Professor at MIT.
Ronald Kepczak 	Adam William Zastrow	Marine Gunnery Sergeant Daniel Backer's step-brother.
Ian 	Timothy Hornor 	
Sophie 	Danny Brown 	
Payload Operator 	Mo Beatty 	
Daniel Backer 	Blake Webber 	Gunnery Sergeant in the United States Marine Corps and the main murder victim.
  v - [ e] - dNCIS Season 17
♦ Out of the Darkness (episode) ♦ Into the Light (episode) ♦ Going Mobile (episode) ♦ Someone Else's Shoes (episode) ♦ Wide Awake (episode) ♦ Institutionalized (episode) ♦ No Vacancy (episode) ♦ Musical Chairs (episode) ♦ IRL (episode) ♦ The North Pole (episode) ♦ In The Wind (episode) ♦ Flight Plan (episode) ♦ Sound Off (episode) ♦ On Fire (episode) ♦ Lonely Hearts (episode) ♦ Ephemera (episode) ♦ In a Nutshell (episode) ♦ Schooled (episode) ♦ Blarney (episode) ♦ The Arizona (episode)
Category:NCIS Episodes
Category:NCIS Season 17 Episodes
Category:NCIS Episodes written by Lisa Di Trolio
Category:NCIS Episodes directed by William Webb