Tad's hypnotic slug Pieper has gone megamorph, his gang of supporters all have Gattler blasters and Tad's control over his new ghouls is stronger than Dr. Blakk's ever was. The Shane Gang are under non-stop ghoul fire as they struggle to put a stop to Tad's plans and the mass ghouling of slugs once and for all.

Tad is missing after the slug-out with the Shadow Clan, so the Gang sets off without him to investigate reports of slugs disappearing. The mystery deepens as the trail of slugs leads straight to Dr. Blakk's old stronghold!

As the Shane Gang returns to the 99 caverns from their Eastern adventure, they find Gateway Cavern overrun with slugs. In the Shane Gang's absence, the Shadow Clan took a different approach to protecting the caverns, putting slugs before the needs of people and it's up to Eli and the gang to restore balance.

The Shane Gang takes Tad under their wing, training him to become a great slugslinger with Eli's old blaster. Their training is put to the test when the Gang brings Tad to answer a distress call that leads to a showdown with the Scrap Force and the Shadow Clan.

15-year-old Eli Shane is just a regular kid from the suburbs, except for one thing: he comes from a long line of Shanes, each of whom has made the journey from the surface to protect Slugterra and the slugs that make the underground world so special. 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, quickly shows that he's not! So when word of this new Shane reaches the ears of the nefarious Dr. Blakk, he's not too worried... yet.

Eli Shane wins his battles and gets a new slug. It's time for the finals, but Eli is beaten with a dark slug given to his opponent by Dr Thaddius Blakk.

The gang has to trade one of Eli's prized his slugs for some new gear, but when Eli has second thoughts and goes back to get his slug, they learn its been sold to Dr. Blakk!

When the hooligang enters the Quiet Lawn Cavern and think no one is tough enough to stand up to them, they get proven wrong by Eli and his gang.

When Eli and the gang enter the Deadweed cavern, they discover a huge amount of El Diablus Nacho, the Dark Water Dr Blakk uses to brainwash innocent slugs.

Eli wants to enter the Slug Run, despite being told he isn't experienced enough. He finds himself up against some tough opponents, including Vance Volt, who works for Blakk.

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! Hoping to find the cause of the glitch, the gang instead uncovers a huge conspiracy--hatched by Dr. Blakk!

Eli doesn't believe in ghosts -- until he enters Deadweed cavern! But it turns out Eli's first instinct was right. What lurks inside Deadweed is far more evil than ghosts, its El Diablus Nacho, after a supply of the dangerous Dark Water that Dr. Blakk uses to turn innocent slugs into Ghouls.

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. Just when it looks like our heroes are done for, they are helped out of this jam by a most unlikely savior.

Pronto is thrown in jail on trumped-up charges by a corrupt judge, and the only chance to break him out is Eli making a one-in-a-million trick shot. Only one slinger in all of Slugterra can help Eli make a shot like that—Mario Bravado. Finding the formerly-great-but-now-washed-up Mario is easy. Getting him to help is something else entirely.

Long thought to be merely a legend, an Enigmo Slug has finally been spotted. The bidding is high for this, the 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!

After a wild ride on the mysterious Flumes, the Underriver that runs beneath all the Slugterra, the Shane gang find themselves dropped into a sea cavern, where they are promptly shanghaied into the crew of the Pirate Captain Malvolio Drake.

A fun trip to the mall cavern turns un-deadly when the place is over run by the zombie-like victims of the Zombus slug. With Pronto zombified (not entirely a bad thing, the others kind of like this new, quieter, more monosyllabic Pronto), the rest of the Shane Gang must find the mysterious Mr. Saturday who controls the Zombus slugs -- and find a way to stop him.

The four members of the Shane Gang think they've found the fifth in Twist, a street-smart kid who volunteers his help when the gang needs it most on a mission gone wrong. However, Twist harbors a dark secret that could doom the mission — and the Shane Gang.

Along with Twist, the Shane Gang plan to rob a train carrying the last of Dr. Blakk's Dark Water. They work out the plan and are trapped by Diablos Nacho. Kord realises that Twist works for Dr. Blakk.

Avalanched inside a frozen cavern, the Shane Gang can't figure out which is worse: being trapped with a vicious Ice Ogre that only gets bigger the more you shoot it? Or needing to work with The Hooligang to get out?

A thief breaks into the Shane Gang HQ looking for the fabled "Shane Treasure" — a portion of which she believes belongs to her. The thief escapes with nothing, but Eli does manage to find a treasure chest. To unlock it, and when they finally open the box, what's inside is not at all what they were expecting..

Notorious con man Gar Revelle has many convinced he has discovered the way to a secret land... a land that seems to be the surface! Eli uncovers the truth—Gar is getting his information from a coded Shane diary.

Chiller causes trouble on the Slugs journey; such as sneeze-freezing the tunnel home, angering a Slughound, and getting Burpy caught by Locke and Lode.

Driven by his intense slug phobia, scientist Quentin Kozinski has invented mechanical slugs. Armed with this fearsome arsenal, he sets out to prove that science can beat any slug - and any slinger - including the Shane Gang!

A mysterious slugslinging master appears for the first time in 20 years. Though old, this slinger is an amazing battler—incredibly fast and the master of an unstoppable slinging technique. Eli, Kord, Trixie and Pronto all want to study with the master and learn this awesome move.