Undertow
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.
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More from this season
S1 E1
The World Beneath Our Feet (1)
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.
S1 E2
The World Beneath Our Feet (2)
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.
S1 E3
The Trade
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!
S1 E4
The Slugout
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.