The Line of Duty is one of the most compelling Most Wanted side missions in Batman: Arkham Knight, requiring players to rescue missing firefighters scattered across Gotham City. Completing this multi-stage quest is necessary for achieving full completion and securing the city against ongoing militia threats. By understanding how to track, approach, and liberate each firefighter crew, players can efficiently clear the streets and progress toward unlocking the Knightfall Protocol.

Locating Missing Firefighters Across Gotham

Finding every member of Station 17 requires systematic exploration across Bleake Island, Miagani Island, and Founders Island. While some locations are revealed through GCPD dispatch communications, others must be discovered manually using Detective Vision while gliding over rooftops. Scanning for clusters of armed thugs surrounding a central hostage is the most reliable visual indicator for identifying active rescue sites.

Early in the campaign, only a limited number of firefighters will be accessible to players. Additional rescue locations open up progressively as main story milestones are cleared and new island bridges are restored. Tracking missing crew members systematically prevents unnecessary backtracking and ensures a steady stream of Upgrade Points throughout your playthrough.

Tactical Strategies for Hostage Combat Encounters

Each firefighter rescue scenario presents a unique tactical puzzle involving varied enemy compositions and environmental hazards. Players must prioritize taking down armed thugs first to prevent hostages from being caught in crossfire or executed during open brawls. Utilizing Smoke Pellets and Fear Multi-Takedowns allows Batman to neutralize initial threats before enemy squads can react.

Later encounters feature heavily fortified positions with snipers, brute enemies, and militia turrets defending the target area. Disabling automated turrets with the Remote Hacking Device and isolating elite foes ensures safer combat flow. Maintaining environmental awareness guarantees that firefighters remain unharmed while clearing out remaining militia forces.

Confronting Chief Underhill and Final Mission Resolution

Once all fifteen firefighters are freed from militia captivity, Batman uncovers the locations surrounding Chief Raymond Underhill's disappearance. The final confrontation takes place on Founders Island, where players must execute a precise stealth strategy to eliminate a well-armed militia squad. Rescuing Chief Underhill unlocks the ultimate narrative revelation behind the arson attacks threatening Gotham City.

After neutralizing the final guards, Batman escorts Chief Underhill back to the GCPD lockdown facility to finalize the mission line. Completing the entire quest rewards players with valuable Gotham Most Wanted progress and essential waypoints for end-game achievement hunting. Mastering these rescue missions strengthens your overall combat proficiency and enriches the game's overall narrative experience.