Mercy

A casualty surgeon at Mercy Hospital who must navigate a violent hostage crisis while protecting her son. Two years earlier, her husband died in Afghanistan, which fuels her resolve to save lives at any cost. During the siege she uses medical skill and quick thinking to shield others, displaying courage under fire.

Michelle’s son, hidden during the crisis to keep him safe. He embodies hope and resilience as he navigates the fear around the hospital siege. His safety becomes a central motivation for Michelle’s actions.

A member of the Quinn Gang who is captured during the hospital incident. His lineage to Sean and Paddy frames the larger criminal web. He later reveals to Paddy that Sean shot him, complicating loyalties.

The ruthless mastermind behind the hostage crisis, who leads the assault and uses a bomb vest to threaten the hospital. He kills hostages and resistance with a cold, strategic mindset, ultimately meeting his end at Michelle’s hands after Bobby’s intervention.

Sean and Ryan’s father, a patriarch trying to steer his family away from ruin. He exposes truth to protect his son’s fidelity to the FBI, but is tragically shot by Sean while attempting to stop the chaos. His death and confession highlight failure and redemption within a broken family.

An FBI agent who orchestrates the hospital response and coordinates from the outside. He survives the initial attack, retrieves information, and kills Johnno in the tunnels, while praising Michelle’s bravery for the team.

An FBI agent who is wounded early in the siege and later killed when Sean disconnects his ventilator. His loss underscores the human cost of the pursuit of justice.

A doctor held hostage by the attackers who is killed by Sean when a bomb is activated. His role underscores the indiscriminate nature of urban violence and the toll on medical staff.

One of Sean’s henchmen who attempts to grab Bobby and is killed by Ellis during the climax. His presence personifies the danger and threat of the assault.

Another henchman who helps stage the attack and is killed during Michelle’s counterattack. His role marks the violent escalation of the siege.