The Rat King's hideout is a location that makes it's debut in the 2012 Series. It is surrounded by abandoned sewer tunnels, which creates the perfect atmosphere so that the former Dr. Victor Falco may conduce his crime-against-nature experiments and lead his nearly unstoppable rodent legion.
The Rat King's hideout appeared in all of the episodes that feature Dr. Victor Falco, except for "Monkey Brains".
- "I, Monster" - In the beginning Victor Falco was hidden from the world in a abandoned warehouse, but after the fire and the accident caused in his lab, he moved to the sewer galleries beneath NYC with all of his rat subjects as well.
- "Of Rats and Men" - Falco added electronic cages to his lair so that he could capture several dozen humans for his "rat people" experiements.