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|The Shield character|
|First appearance||"The New Guy" (episode 6.04)|
|Last appearance||"Spanish Practices" (episode 6.10)|
|Created by||Shawn Ryan|
|Portrayed by||Alex O'Loughlin|
|Title||Detective, former Strike Team leader|
Hiatt was originally an INS agent who spent four years on the Mexican border before joining the LAPD, where he was regarded as a rising star within the force. Upon the recommendation of David Aceveda, Hiatt was brought into "The Barn" by Captain Wyms to not only replace the loss of Curtis Lemansky, but to also be the replacement for Detective Vic Mackey, who was being forced out of the department upon his 15th year of duty. He was also giving Captain Wyms information as to what was really going on within the Strike Team, since they've resisted almost all attempts to allow an outsider into the group.
Arrival at the Barn
Hiatt met the Strike Team during a raid on a hostage situation. He was introduced, then told to stay behind while the team entered the building. Not content to sit on the sidelines, Hiatt quickly donned a bulletproof vest, took a shotgun, and assisted the team in securing the shooter. Hiatt was taken to the Barn, where he was filled in on the situation by Mackey, as well as being warned that he was not ready for Farmington's worst citizens.
Hiatt was then met by Wyms, who asked what he knew of Vic Mackey. He replied that despite Mackey's numerous arrests and results, he has had two members of his team "end up dead" and one member not return to active duty. Hiatt was advised to keep his distance from Vic and that soon enough, the Strike Team would be his.
As a team member
Hiatt accompanied Vic through a situation in which several former soldiers of the One Niners were attempting to break loose from the gang, resulting their deaths for their disloyalty. Hiatt got to know the other members of the team back in the Strike Team's clubhouse, but also drew the ire of Shane Vendrell, who viewed Hiatt as an interloper and chastised the other team members for forgetting about deceased team member, Curtis "Lem" Lemansky. Shane was particularly angered when, during a critical incident, Hiatt offered to assist, but used Lem's shotgun to take out a suspect.
After his initial observations, Hiatt advised Wyms that from what he observed, Vic may not have been as dirty as the department made him out to be, but rather a victim of his methods, as seen by his apparent playing of several sides in order to get results. Wyms advised Hiatt to again watch himself and wait for the opportunity to witness Mackey's bad side, which he did when Mackey destroyed a hospital waiting room in anguish over the death of the leader of the rebel One Niner soldiers.
Hiatt also stated a desire to hire his own team members to expand the Strike Team, and was promptly given the dossier of officer Julien Lowe. As time passed, Hiatt began to lean on Vic's experience with Farmington and the gangs in the area. Hiatt even disclosed to Mackey the fact that his hearing was rigged in order to have him pushed out of the force, which caused Vic to confront Claudette over this knowledge.
Relationship with Tina Hanlon
Hiatt drew the attention of Tina Hanlon, who was taken with the young officer and sought to gain his attention with her police work and personal life. Hiatt flirted back in return, but did not pursue Hanlon until Steve Billings informed him that Holland "Dutch" Wagenbach was also interested in Hanlon. Hanlon and Hiatt shared a one-night stand, ruining Hanlon's potential for a more serious romance with Dutch; this situation is manipulated by Billings. Hiatt did not disclose his sexual relationship with Hanlon, a junior officer, to his superiors.
It became apparent that Hiatt was in over his head as far as what goes on in Farmington. Several mistakes and actions caused Claudette to doubt Hiatt and warnings from Shane about Vic possibly attempting to seize control of the Strike Team again if his hearing turned out in his favor created an uncomfortable situation that Hiatt attempted to work through. However, several blunders by Hiatt, including the arrest of one of Vic's valuable informants, as well as his one-night stand with Tina Hanlon, resulted in Hiatt being dismissed from the Barn and reassigned to another department.