The Citadel also known as Blakk Industries is Dr. Blakk's base of operations and residence. It made its debut in The World Beneath Our Feet Part 1, where Dr. Thaddeus Blakk is told by Maurice that a guy with the name Shane (Eli) entered himself into a local tournament claiming to be the son of Will Shane.

The Citadel appears in most of the episodes in which Blakk is seen, and looks to be abandoned after Blakk's defeat in Light as Day. It appears again in a flashback in Slugterra: Ghoul from Beyond and finally in the fifth movie, when the Shane Gang finds that the Slugs are going missing across The 99 Caverns and they go here instead.



Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.