Church Hostages - Batman: Arkham City Guide - IGN

Joker's sniper is nearby, but in order to pinpoint his location you'll need to examine the two points of contact made by the bullet.

Stop Protocol 10 - Batman: Arkham City Guide - IGN

Batman: Arkham City Guide - IGN

Batman: Arkham City - Riddler Hostage #2 - Enigma Conundrum Side

Steam Community :: Guide :: Enigma Conundrum. Riddler's Hostages Guide

Batman: The Animated Series, Ultimate Pop Culture Wiki

Steam Community :: Guide :: Enigma Conundrum. Riddler's Hostages Guide

Enigma Conundrum (riddles 1-9) Side missions - Batman: Arkham

Batman: Arkham City - Riddler Hostage #2 - Enigma Conundrum Side

Batman: Arkham City Guide - IGN

02 Batman Arkham City Official Strategy Guide, PDF, Batman

Church Hostages - Batman: Arkham City Guide - IGN

Stop Protocol 10 - Batman: Arkham City Guide - IGN

Batman Arkham City Watcher in the Wings side mission guide

Steam Community :: Guide :: Enigma Conundrum. Riddler's Hostages Guide