The Line of Duty quest in Batman: Arkham Knight requires players to rescue fifteen missing firefighters scattered across Gotham City. Tracking down these hostages is crucial for securing the city and discovering the truth behind Chief Underhill's disappearance. Completing every rescue mission advances your Most Wanted progress and moves you closer to unlocking the true Knightfall protocol.

Finding Firefighters on Bleake Island

Bleake Island contains six missing firefighters that become available during the early stages of the campaign. Players can find Firefighter Wood near Dixon Docks, surrounded by armed thugs that require a stealthy predator approach. Clearing these initial encounters helps establish your tactical awareness for the more complex hostage situations found later in the story.

Other Bleake Island locations include the rooftop near the GCPD building and the lower docks close to the Chinatown district. Utilizing the Batmobile's scanner or listening for distress radio chatter makes locating these isolated groups much easier. Taking down the armed guards quickly prevents them from harming the hostages during the combat phase.

Locating Hostages Across Miagani Island

Miagani Island features four additional firefighter encounters that test your combat and predator skills. One notable location is near the Grand Avenue Station, where a heavy concentration of riot-shield thugs guards the hostage. Using the Batmobile's remote control feature can help break up dense enemy formations before entering the fight directly.

Another firefighter is trapped near the Botanical Gardens, surrounded by armed militia troops. Approaching from high vantage points allows Batman to perform multi-takedowns and neutralize key threats instantly. Rescuing these crew members unlocks critical dialogue details regarding the mysterious circumstances of their capture.

Clearing Founders' Island Rescue Objectives

Founders' Island holds the final group of hostages, presenting some of the most challenging encounters in the side mission. The construction sites and elevated walkways host heavily armed mercenaries equipped with sniper rifles and sentry turrets. Disarming these automated defenses with the Remote Hacking Device is essential before engaging the enemy forces.

Navigating the complex vertical architecture of Founders' Island requires careful planning and precise grappling maneuvers. Once you rescue the remaining crew members, the final location of Chief Underhill is revealed. Confronting the chief concludes the narrative arc and resolves the mystery surrounding Station 17.

Tactical Tips for Efficient Rescues

Prioritize taking out armed guards and lieutenants first during every Line of Duty encounter to maintain control of the battlefield. Environmental takedowns and smoke pellets offer quick ways to thin out large groups without endangering the hostages. Maintaining high mobility prevents enemies from pinning Batman down in tight alleyways or rooftop corners.

Upgrading your Disruptor and Remote Hacking Device makes tackling late-game rescue missions significantly smoother. Listening closely to GCPD dispatch transmissions also provides updated coordinates as new leads open up across the city. Following a methodical search pattern ensures no missing firefighter is left behind in Gotham.