After a wild ride on the mysterious Flumes - the Underriver that runs beneath all of Slugterra - the Shane gang find themselves dropped into a sea cavern.
Long thought to be merely a legend, an Enigmo Slug has finally been spotted. The bidding is high for this rarest of all slugs, and so is the competition to be the first grab it! Eli and the gang actually beat Slugterra's most vicious slug hunter to the prize-only to find that the hunter is now hunting them!
A short cut takes the Shane Gang through the territory of the Shadow Clan - and try as they might not to, they are discovered and captured by the mysterious creatures.
Eli doesn't believe in ghosts - until he enters Deadweed cavern! But it turns out Eli's first instinct was right.
When even Kord can't find a way to fix what's wrong with the new upgrades to the Shane Gang's Mecha Beasts, it's time to go to the source: the wondrous Mecha Forge!
The Slug Run is the ultimate, off-road, no-holds-barred, cross-cavern Mecha Beast race. Unfortunately, the only thing lower than the odds of beating the three-time champ who's now racing for Dr. Blakk are the odds of Eli making it to the finish line in one piece!
When the punks in the Hooligang cruise into Quiet Lawn Cavern, they think no one there's got the guts to stand up to them so they trash the place.
After the Shane hideout is ransacked, the gang trades in one of Eli's prized slugs for new gear. When Eli has second thoughts they go back to get it, only to learn that it's been sold to Dr. Blakk, along with hundreds of others to be transformed into feral Ghoul Slugs. Eli refuses to let his slug or any other get ghouled, so the team breaks in to Blakk's fortress to free them. While inside, they learn of Blakk's plan to conquer Slugterra.
Now its Eli's turn to be Slugterra's next Shane, whether he's ready or not! Unfortunately, the slugslinging tournament he enters to prove that he's ready, pretty quickly shows that he's not!
Eli has added some awesome new slugs to his arsenal: the Elementals. But the Elemental Slugs are ancient, extremely powerful, and temperamental, and Eli can't control them. Junjie, the newest member of the Shane Gang, has the solution: Eli must learn Slug Fu, the ancient form of slugslinging that Junjie mastered in the Eastern Caverns. Slug Fu is the art of guiding and controlling a slug in battle, a skill that only the greatest slugslingers can master.
Eli has added some awesome new slugs to his arsenal: the Elementals. But the Elemental Slugs are ancient, extremely powerful, and temperamental, and Eli can't control them. Junjie, the newest member of the Shane Gang, has the solution: Eli must learn Slug Fu, the ancient form of slugslinging that Junjie mastered in the Eastern Caverns. Slug Fu is the art of guiding and controlling a slug in battle, a skill that only the greatest slugslingers can master.
A new member joins the Shane Gang! His name is Junjie, and he is a master of the mysterious slugslinging art of Slug Fu. But even with the power of five slingers, the Shane Gang find themselves in over their heads trying to protect the ancient Elemental Slugs.
The Dark Slinger and his marauders have invaded Slugterra! But there's more to this new threat than meets the eye. Eli must fight a very different kind of duel to save Slugterra...and himself.
Eli and the Shane Gang have vanquished Dr. Blakk. But a new threat emerges from beyond the 99 caverns.
Dr. Blakk and his Darkbane minions have discovered a way to make their ghouls faster and stronger - giving them an edge over the Shane Gang.
Eli's got a new slug recruit! But in the heat of battle, can this rookie go from frightened novice to the hero of the day?
The Shane Gang defend the perimeter from the legions of Blakk Guards sent to free Dr. Blakk from prison.
Eli has added some awesome new slugs to his arsenal: the Elementals. But the Elemental Slugs are ancient, extremely powerful, and temperamental, and Eli can't control them. Junjie, the newest member of the Shane Gang, has the solution: Eli must learn Slug Fu, the ancient form of slugslinging that Junjie mastered in the Eastern Caverns. Slug Fu is the art of guiding and controlling a slug in battle, a skill that only the greatest slugslingers can master.
A mysterious creature is draining the energy from all the slugs in a distant cavern, and the residents are offering a rich reward to whoever can stop it.
Burpy is sick, and the only thing that will cure him is a trip to the Lightwell - a mysterious, hidden power source only slugs (and the Shadow Clan) know the way to.