The Glock 17 is a pistol.
JAG[]
In the JAG Season 3 episode, Impact (JAG Season 3 episode), DSD agent Clark Palmer was seen wielding a Glock 17.
In the JAG Season 4 episode, Embassy (episode), Sudanese guards were seen carrying Glock 17s. Harm was later seen aiming a Glock 17 at the Ambassador responsible for orchestrating the siege and who was also threatening Mac.
In the JAG Season 7 episode, Lawyers, Guns, and Money (episode), CIA agent Clayton Webb carried a Glock 17 while undercover.
In the JAG Season 9 premiere episode, A Tangled Webb (Part 2) (episode), Mac was seen holding the Glock 17.
NCIS[]
FBI agent Tobias Fornell used a Glock 17 as his personal sidearm with the gun debuting in the NCIS Season 1 episode, Enigma (episode).
It also appeared in the NCIS Season 1 episode, Split Decision (episode).
It appeared in the NCIS Season 2 episode, Terminal Leave (episode).
It appeared in the NCIS Season 4 episode, Faking It (episode).
It appeared in the NCIS Season 5 premiere episode, Bury Your Dead (episode).
It also appeared in the NCIS Season 5 episodes, Stakeout (episode), Requiem (episode) and Lost and Found (episode).
It appeared yet again in the NCIS Season 6 episode, Nine Lives (episode).
It appeared in many episodes of NCIS Season 8.
It appeared in NCIS Season 9.
It appeared in numerous episodes of NCIS Season 11.
NCIS: Los Angeles[]
It appeared in many episodes of NCIS: Los Angeles Season 1 and also served as the personal sidearm for LAPD Detective Marty Deeks.
It appeared in numerous episodes of NCIS: Los Angeles Season 2.
In the NCIS: Los Angeles Season 3 premiere episode, Lange, H. (episode), Lauren Hunter was seen wielding a Glock 17. It was seen once again during the NCIS: Los Angeles Season 3 episode, Greed (episode).
It appeared in various episodes of NCIS: Los Angeles Season 4.
NCIS: New Orleans[]
The Glock 17 is seen with numerous people during various episodes of NCIS: New Orleans.
NCIS: Hawaii[]
The Glock 17 is seen with numerous people during the NCIS Hawaii Season 1 episodes.
NCIS: Sydney[]
The Glock 17 is the sidearm of members of the Australian Federal Police or AFP including Sergeant Jim Dempsey and Constable Evie Cooper while NCIS agent Michelle Mackey uses it as her own personal sidearm.
During the episode, Doggiecino Day Afternoon (episode), two New South Wales police officers are seen wielding the Glock 17 while responding to a 000 call.
It appeared in the episodes, Bunker Down (episode) and Blonde Ambition (episode).