The Line of Duty is one of the most memorable Most Wanted side quests in Batman: Arkham Knight, tasking players with finding and saving 15 firefighters trapped across Gotham City. This multi-stage rescue mission requires a mix of spatial investigation, tactical predator gameplay, and high-impact combat to safely extract the captive crew members. Understanding the progression and location layout ensures you can complete the quest efficiently while unlocking valuable upgrade points.
Locating Firefighters Across Gotham's Islands
Your search spans Bleake Island, Miagani Island, and Founders' Island, with crew members scattered in isolated corners and hidden alleys. Bleake Island holds the initial set of hostages, including the first mandatory rescue near Dixon Dock West. As you advance through the main storyline, new districts become accessible, revealing additional hostage situations guarded by armed militia groups.
Using Detective Mode while gliding above the city helps identify clusters of armed thugs surrounding captive firefighters. Paying attention to radio transmissions and GCPD updates can also provide helpful indicators for pinpointing tricky locations. Completing each rescue brings you one step closer to uncovering the true mystery behind the crew's sudden disappearance.
Combat and Predator Rescue Strategies
Every firefighter rescue presents a unique combat or stealth scenario that tests your tactical approach. Many locations involve hostile groups armed with firearms, shock batons, or brute strength that require careful gadget preparation. Utilizing gadgetry such as the Smoke Pellet, Remote Electrical Charge, or Disruptor allows you to neutralize high-threat targets before initiating a full assault.
In predator environments, isolating guards and executing Fear Multi-Takedowns serves as the fastest method to clear heavy resistance. Always prioritize disarming heavily armed thugs first to prevent accidental casualties during the chaotic brawl. Once all hostile forces are subdued, interacting with the captive firefighter secures the location and grants key progress.
Rescuing Fire Chief Underhill and Mission Conclusion
After saving all 15 firefighters, the final objective directs Batman to rescue Fire Chief Raymond Underhill. Located at the top of an unfinished building on Founders' Island, the chief is heavily guarded by patrolling militia thugs and automated sentry guns. You must carefully bypass or blind the security systems using the Remote Hacking Device to eliminate the guards safely.
Upon clearing the area and freeing Chief Underhill, a shocking revelation regarding his involvement with the crisis comes to light. Escorting him back to the GCPD Lockup successfully concludes the entire mission arc. Completing this quest grants substantial upgrade points and unlocks the "Death of Innocents" achievement for your total game completion.
