Safe House

Marshall is the senior government official who ordered the agents to the safe house in the first place. Throughout the final act, Owens watches him slip away from the control room after the confrontation with Elijah, and realizes he was the one who orchestrated the entire attack. Before she can stop him, Marshall detonates an explosive charge that destroys half the building to erase evidence of his involvement.

The football is a compact device capable of generating nuclear launch codes instantly. Elijah reveals during the climactic gunfight that he helped orchestrate the terrorist attack specifically to get his hands on the football. His plan was to use it to fire a nuclear strike on Washington, D.C., but Owens manages to shoot him and disarm the bomb just before the timer runs out.

Anderson, the seemingly benign caretaker, was actually a covert operative named Elijah who had been secretly working as the mole inside the safe house. He had been feeding information to the attackers and waited until the right moment to reveal himself during the house breach. However, his true loyalty was to the broader conspiracy, not as the ultimate leader.

Yes, Owens is the sole survivor of the safe house massacre. After Elijah is killed and the bomb is disarmed, she discovers Marshall's betrayal and watches him escape. She then gives chase through the smoking wreckage, leaving her on the brink of a new personal war against the conspiracy.

The Copperheads are the shadowy organization behind Marshall's conspiracy. They remain hidden throughout the ending, with only brief references to their existence. The film ends with Owens knowing that the true threat comes from inside the government, setting up her upcoming fight against this unknown enemy.

Marshall triggers a massive explosive charge that demolishes half the building specifically to erase evidence of his involvement in the conspiracy. With the immediate threat from Elijah neutralized, he uses this opportunity to eliminate any proof linking him to the terrorist attack and the murder of the agents.

Yes, the ending is deliberately ambiguous regarding Marshall's ultimate fate. He successfully slips away from the control room and triggers the explosion before Owens can stop him. The film ends with Owens in pursuit, but Marshall's ultimate fate and the full consequences of his actions remain unresolved.

During the chaotic gunfight when the house is breached, Elijah murders Choi, slits Sorello's throat, and wounds Halton. These deaths occur in rapid succession as part of Elijah's attempt to seize control of the football. Halton's specific fate is not fully detailed, but only Owens survives by the end.

After Elijah forces Owens to activate the football device with her biometric eyes, she manages to turn the tables by shooting him and disarming the bomb just before the timer runs out. This action averts the nuclear catastrophe that would have struck Washington, D.C.

The ending reveals that the man tasked with protecting the nation, Marshall, is actually its biggest danger. The film concludes with Owens pursuing a conspiracy that reaches the highest levels of government, suggesting that betrayal lurks at the very heart of the institutions meant to keep people safe.