Thief Catcher

From WoWWiki

These Ironforge Dwarf NPC's come in a set of 3:

Members

Name	Location
A [60+]  Thief Catcher Thunderbrew	Ironforge
A [60+]  Thief Catcher Farmountain	Ironforge
A [60+]  Thief Catcher Shadowdelve	Ironforge

NPC Information

These NPC's patrol the city seeking stealthed Horde intruders and upon discovering one - will attack on sight, and thus alert the city to their presence. Unlike the Troll Roof Stalkers, they are not stealthed or stationary but patrol throughout the city on a set route that takes them to least 90% of the city, behaving similarly to the Orgrimmar Scouts, Stormwind Officers, Darnassus' Huntresses, Thunder Bluff's Hunters, and Undercity Seekers.

Trivia

If a player zooms in on one of these NPC's as they pass, a pair of Catseye Ultra Goggles is clearly visible being worn on their heads - most likely to aid in their stealth detection capabilities.

See List of Ironforge NPCs.