Slugterra (2012)
S04E01 Into the Shadows: Back on the Shane Gang (1)
Episode Overview
Upon returning to the 99 caverns after their journey to the East, the Shane Gang discovers that Gateway Cavern is infested with slugs. While they were away, the Shadow Clan adopted a new strategy for safeguarding the caverns, prioritizing the slugs over the well-being of the community. Now, it falls to Eli and his friends to bring harmony back to the caverns and address the imbalance.