James Reece is a highly trained Navy SEAL team leader who survives a devastating ambush that wipes out his entire troop. Shortly after returning home, he receives a terminal brain tumor diagnosis and loses his wife and daughter in a violent home invasion. Believing these events are part of a coordinated cover-up, he compiles a list of the conspirators and begins tracking them down. He operates with a strict personal moral code and relies heavily on his extensive tactical combat experience to systematically dismantle the network responsible for destroying his life.

Katie is an investigative journalist known for writing hard-hitting exposés on military scandals. She is resourceful and committed to finding the truth regardless of political pressure or personal danger. Her father, a doctor in Czechoslovakia, was rescued by Reece's father years ago, giving her a deep-seated respect for the Reece family and a strong motivation to help James uncover the military conspiracy.

Ben is a former Navy SEAL and Reece's closest friend. He transitioned into civilian intelligence work for a covert US agency, granting him deep access to classified government databases. He provides Reece with crucial logistical support, safe houses, and digital intelligence to help him track down the people responsible for his family's murder. He stands in physical contrast to Reece, sporting heavy tattoos and enjoying a wealthy civilian lifestyle.

Steve Horn is the power-hungry CEO of Capstone Capital and the primary corporate architect behind the experimental PTSD drug trial known as "the Project." He views the endless conflicts in the Middle East purely as a lucrative business opportunity. He is obsessed with wealth and status, treating human beings simply as expendable assets in his pursuit of billion-dollar defense contracts.

Lorraine Hartley is the Secretary of Defense, nicknamed "The Undertaker" for her penchant for wearing all-black designer clothing. She is a shrewd political climber who uses the military to further her own presidential ambitions. She treats the Pentagon as a profit center, readily authorizing illegal trials and covering up military casualties to maintain her public image and secure funding.

Admiral Pilsner is the high-ranking leader of the Navy SEALs. He has never commanded men in combat, earning him the nickname "Lord Fobbit" from his troops. He is deeply focused on diversity initiatives and political optics rather than tactical effectiveness, making him a direct foil to Reece. He willingly sacrifices his own men to advance his career and secure financial payouts.

Liz is a private pilot for a Texas oil tycoon and a fiercely loyal friend to Reece. Her military career ended after her helicopter was shot down in Iraq and Reece's team rescued her from insurgents. She provides critical air transport and logistical aid as Reece moves across the country, willingly risking her own safety and freedom to help the man who saved her life.

Marco is a wealthy Mexican businessman who helps fund Reece's operations. He bonds with Reece over their shared devotion to family, viewing Reece's violent quest as a philosophically just cause. He provides ground transportation, cash, and armed security when Reece operates near the border.

J.D. Hartley is a former congressman and the husband of Secretary of Defense Lorraine Hartley. His own presidential ambitions were derailed by an infidelity scandal, but he maintains immense power through his consulting firm, which takes a cut of defense contracts. He works closely with Steve Horn and relies on his wife's position to secure wealth.

Mike Tedesco is a major fundraiser for the Hartleys and the executive tasked by Steve Horn to organize the PTSD drug project. He is primarily motivated by a desire to make enough money to retire comfortably and spend time with his family. As the violence surrounding the project escalates, he realizes he is trapped in a highly dangerous situation.

Saul Agnon is an underling and assistant to Steve Horn at Capstone Capital. He acts as a middleman, coordinating between the corporate executives and the various operatives hired to clean up the drug trial's loose ends. He is cowardly and relies entirely on his boss's power to shield him from consequences.

Josh Holder is a Defense Criminal Investigative Services (DCIS) agent working secretly for the Hartleys and Steve Horn. He acts as a violent fixer, threatening military doctors to alter medical records and executing ground-level assassinations to ensure the experimental drug trial remains a secret.

Captain Leonard Howard is a Judge Advocate General officer working under Admiral Pilsner. He acts as the administrative liaison between the military command and local religious figures in Afghanistan, playing a key role in orchestrating the disastrous Khost Province mission that wiped out Reece's team.

Lauren Reece is James Reece's wife. She is murdered during a violent home invasion shortly after Reece returns from Afghanistan. She dies trying to physically shield their daughter and manages to shoot one of her attackers, demonstrating immense courage in her final moments. She is pregnant with a baby boy at the time of her death.

Lucy is James Reece's young daughter. Her tragic death breaks Reece's spirit and severs his ties to a normal life. Her crayon drawing of their family becomes the physical document where Reece writes his "terminal list," keeping her memory close as he hunts down her killers.

Boozer is the only other surviving Navy SEAL from Reece's ambushed troop. He stays by Reece's side in the hospital but is found dead of an apparent suicide shortly after returning to his apartment in the United States. His death immediately raises Reece's suspicions regarding a larger cover-up.

Thomas Reece is James Reece's deceased father, a former CIA operative and Navy SEAL. He left behind a legacy of immense respect in the intelligence community and bequeathed James a custom-built sniper rifle. His past actions directly influence Katie Buranek's willingness to help James.

Judy Reece is James Reece's mother. She lives in an assisted living facility and suffers from worsening dementia following a stroke and the death of her husband. Despite her condition, she provides Reece with an unexpected moment of clarity and spiritual encouragement before he embarks on his mission.

Marcus Boykin is a wealthy accountant who manages Capstone Capital's financial interests in the Project. He lives a rigid, routine-oriented life in one of his vacation homes in Wyoming, making him an easy and predictable target for Reece's surveillance.

Dr. O'Halloran is a spine surgeon in the US Army Reserves stationed at Bagram Air Base. He discovers the rare malignant brain tumors in Reece and his men and begins asking questions about the anomaly, making him a dangerous liability to the conspirators.

Dr. German is a neurologist and a colleague of Dr. O'Halloran. He conducts the physical biopsy on Reece's brain when Reece returns to La Jolla, California, and inadvertently reveals to Reece that O'Halloran was murdered overseas.

Dr. Russell is a doctor at the Balboa medical facility who clears Reece for duty despite knowing about his brain tumor. He does so only because a DCIS agent threatened to harm his family if he did not alter the medical records.

Robert Bridger is an NCIS Special Agent who attempts to interrogate Reece immediately after the ambush. He works alongside Dan Stubbs to frame Reece for the catastrophic failure of the mission.

Dan Stubbs is a second NCIS Special Agent who aggressively questions Reece about his professional emails. He accuses Reece of subversive activities and conduct unbecoming of an officer, acting on orders from higher-ranking conspirators.

Humza Kamir is a Muslim taxi driver who has been radicalized by an extremist group. In reality, he is being secretly manipulated as an expendable asset by the Secretary of Defense to assassinate Reece in Los Angeles's Chinatown.

Masood is an imam at a Southern California mosque who outwardly preaches peace while secretly funneling money to extremist groups like ISIS. He coordinated the Taliban ambush that killed Reece's troop in exchange for operational support.

Clint Harris is a friend of Reece who owns a private shooting range. He provides Reece with a secure location to transition between vehicles and disposes of Reece's highly recognizable vintage Land Cruiser to help him evade law enforcement.

Fred Strain is a Senior Chief and a former sniper school buddy of Reece. He leads the military team deployed under an emergency waiver to hunt Reece down on American soil, unaware of the full political corruption driving his orders.

Raife is a former SEAL team member who assists Reece during the final stages of his mission. He provides Reece with a boat and logistical support to infiltrate Fishers Island in New York.

General Lewandowsky is the chairman of the Joint Chiefs of Staff. He is a laid-back military leader who advises the president and witnesses Lorraine Hartley's aggressive push to deploy military forces on American soil.

General Stuart is the officer in charge of the Joint Special Operations Command (JSOC). He openly refuses Lorraine Hartley's demands to assassinate Reece domestically, citing the Posse Comitatus Act.

Anthony Craig is J.D. Hartley's personal driver. He is caught in the crossfire when Reece attacks J.D. Hartley's armored car with an explosive device.