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Slugterra: Into the Shadows is the fifth Slugterra Movie in the series and premiered on August 6th, 2016 in Canadian cinemas, as Season Four.



As the Shane Gang return to the 99 caverns from their Eastern adventure, a dispute erupts between them and the Shadow Clan, threatening to shatter the hard-won peace in Slugterra. Eli and the Gang have their hands full dealing with the antics of the usual thugs, plus growing hostility from their former allies. So when Tad and his slug Pieper—who have just arrived from the Surface—lend a hand with Pieper’s amazing powers, Eli welcomes a new team member. But soon this newcomer casts his own shadow on the chaos.

IMPORTANT NOTICE: For TV purposes the movie is divided into 4x22min episodes.

Part 1 - Back on the Shane Gang

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.

Part 2 - The New Boss

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.

Part 3 - Out of the Shadows

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!

Part 4 - Ghouls and Monsters

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.





  • This is the finale episode of SlugTerra.
  • This movie is accompanied by 5 new slugisodes and a mobile game called "Slug It Out: Shadow Wars".
  • It is unknown how the Shane Gang activates The Gateways used back in Slugterra: Eastern Caverns to return to The 99 Caverns as four out of the five Elemental Slugs are left in The Eastern Caverns to be Guardian Slugs.
  • It is unknown how Pieper found her way to The Surface, but Tad says he saved her from a cat.
  • According to Tad, Pieper had been helping in mapping the underground tunnels to SlugTerra for years.
  • This is the first time that Eli mentions his mother in the series.
  • Eli looks unfamiliar with fist bumps when Tad tries to give him a fist bump. Though fist bumps are a way of greeting in Slugterra since Kord, Pronto and Junjie have been seen doing it, notably in "The Unbeatable Master", "Slugterra: Return of the Elementals" and "Stuff of Legend". Moreover, Eli and Junjie have done a fist bump before in "Slugterra: Eastern Caverns".
    • Eli may only do fist bumps to the people he is close to.
  • Despite the protoform of the Diggrix is first seen in "Slugterra: Slug Fu Showdown", its velocimorph is first seen in this movie.
  • In one of the scenes that the slugs are walking into the Citadel, a Megamorph Blastipede is seen.
  • Pronto is the only member of the Shane Gang to be suspicious of Tad since the beginning due to Tad's smell.
  • It remains unknown how Tad finds out that he is the son of Dr. Blakk, who resides in Slugterra.
  • Eli officially turns 16 as revealed at the end of the movie.
  • This episode takes place on Eli's Birthday, like the first episode in the series.


  • When Tad and Pieper take a drop to SlugTerra, they're seen using the same route as Eli and Burpy in "The World Beneath Our Feet Part 1".
    • However Pieper also destroys and reopens "The Drop" that was sealed by Eli in "Light as Day".
    • Since Tad seems to have used the exact same Drop as Eli, there's a good chance Tad lives somewhere near Eli's home.
  • The Gateways used in "Slugterra: Eastern Caverns" is seen again.
  • The King of Sling tells the Shane Gang that the Shadow Clan don't like rockabilly music, which was what he asked them after the Shane Gang left the 99 Caverns in "Slugterra: Eastern Caverns".
  • Pronto being the only Shane Gang member to be suspicious of Tad is the same as Kord being the only one suspicious about Twist in "The New Kid Part 1" and "Part 2".
  • The blaster given to Tad is supposed the old blaster that Eli used to use until "The Slugout".
  • The Scrap Force once again calls themselves "The Tough Guys", which is the original name they used in "The Hard Part".
  • The Citadel is seen again and looks to have been left in the same condition as last seen in "Light as Day".
  • Bob and Blast return since "Slugball".
  • The people in Quiet Lawn Cavern are now able to make loud noises due to the disappearance of the Grenuke slugs, in which they previously expressed their concerns throughout several episodes.
  • The interior of Blakk's old stronghold are exactly as how they were left at the end of "Light as Day".
  • Gattlers once again make a return to the series since their last appearance in "Slugterra: Return of the Elementals".
  • Dr. Blakk once asked Eli about "The Burning World" (The Surface) in "Back to Blakk". However, it is unsure whether Dr. Blakk already knew about The Surface and about his son, Tad, who had been living on The Surface.
  • Tad references the defeat(s) of his father, Dr. Blakk, against Eli.
  • The scene when Trixie tries to high-five the Shadow Clan and only gets the other's confusion in return is the same scene in "The World Beneath Our Feet Part 2" when Eli tried to high-five Kord, which confused him.
  • The chasm created by Terraportal in "Light as Day" returns and just like his father, Dr. Blakk, Tad falls into the hole.
  • Pronto says that they are getting good at throwing people down holes, hinting the events of "Light as Day", "Slugterra: Return of the Elementals" and "The Return of the Eastern Champion".
  • The message from an Enigmo slug is used again since "Slugterra: Return of the Elementals".
  • The scene in The Deep Caverns is similar to the one seen in "What Lies Beneath".


  • In the scene when Tad commands the Scrap Force to shoot their Ghoul Slugs, Pieper is seen in her Megamorph Protoform despite she only achieves the upgrade later.
  • Before using the Double Barrel, Eli loads up his Grenuke and Kord's Rammstone. But when he fires them to perform a Fusion Shot, the Grenuke appears to be a Hop Rock.



Slugterra: Into the Shadows/Gallery



Shane-star (adv.).png The Underground World of SlugTerra
Main series Slugterra (Episodes · Movies)
Spin-off Slugisode (Episodes)
Movies Slugterra: Ghoul from Beyond · Slugterra: Return of the Elementals · Slugterra: Slug Fu Showdown · Slugterra: Eastern Caverns · Slugterra: The Emperor's Revenge · Slugterra: Into the Shadows
SlugTerra Slugs (Elementals · Guardians · Ghouls · Megamorphs) (Aura) (Famous Slug) · SlugSlingers (Gangs)
Species Shadow Clan · Darkbane · Cave Trolls  · Molenoids  · Octoad · Humans · Elves
Blasters Accelerators · Double Barrel Blaster · Wrist Blasters
Games Slug It Out! · Battle For Slugterra · Secret of the Shadow Mines · Slug Run · SlugSlinger Duel · Dark Waters · Slug Life · Slug Wars · Guardian Force
Others The 99 Caverns · Shane Hideout · Mecha-Beasts · The Eastern Caverns
Pages Facebook · Youtube
Opening Burpy.png Slugs Tormato ghoul .png

Grimm.png Types of Slugs in SlugTerra
Common Slugs Flopper · Slicksilver · Diggrix · Gazzer · Sand Angler · Slyren · Fandango · Phosphoro · Polero · Tormato · Tazerling · Rammstone · Frostcrawler · Armashelt · Flaringo · Thresher · Jellyish · Lariat · Dirt Urchin · Hop Rock · Grenuke
Uncommon Slugs Thugglet · Negashade · Blastipede · AquaBeek · MakoBreaker · Xmitter · Hoverbug · Flatulorhinkus · Arachnet · Bubbaleone · Speedstinger · Vinedrill · Lavalynx
Rare Slugs Frightgeist · Geoshard · Hexlet · Neotox · Tenasher · Glowbyss
Extremely Rare Slugs Boon Doc · White Boon Doc · Forgesmelter · Firenzar
Ultra Rare Slugs Infurnus · Enigmo · Crystalyd · Hypnogrif · Narwhaddle · Midas
Elemental Slugs Fire Elemental · Water Elemental · Earth Elemental · Air Elemental · Energy Elemental · Toxic Elemental · Electric Elemental · Psychic Elemental · Plant Elemental · Ice Elemental
Ghoul Slugs Darkfurnus · Amperling · Goon Doc · Grimmstone · Harmashelt · Hop Jack · Thrasher · Frostfang · Attacknet · Flatulo Rex · Bubbalash · Nightgeist · Jollyfist · Briardrill · Aquafreak · Vamparo · Blastinger · Barreto · Photomo · Tempesto · Pyringo · Hoverblade · Dark Urchin · Cryscada · Greneater · Gorgemelter · Cryptogrif · Negablade · Terrarix · Megabreaker · Smugglet · Transplitter · Sand Mangler · Vexlet · Neurotox · Ghoul Geoshard · Disastiped
Other Roboslug · Dustpuff · The Universal Slug · Toxis · Slugling
Opening Burpy.png Famous Named Slugs in SlugTerra
Major Normal Slugs Burpy · Joules · Doc · Yang · Ping · Rookie · Bluster · Bludgeon · Stinky · Mo · Dazer · Spooker · Dozer · Digger · Stunts · Bugsy · Banger · Chiller · Spinner · Tangles · Buzzsaw · Burner · Torch · Beeker · Glimmer · Suds · Mucky · Bolo · Goober · Larry · Rocky · Sparky · Noodle · Joo-Joo · Maggs · Rex · Joker · Yin · Beau · Pieper
Major Ghoul Slugs Loki · The Goon · Sparcx
Minor Slugs Butch · Ricochet · Flutter · Windsor · Old Timer · Dizzy · Wheezy
The Masters of Mystical Creatures

Slugslingers in SlugTerra
Heroes Will Shane · Eli Shane · Beatrice Sting · Kord Zane · Pronto · Jimmo Shane · Junjie · Yang
Villains Dr. Blakk · Viggo Dare · Nacho · Twist · Mr. Saturday · Blite · Malvolio Drake · Brutale Drake · John Bull · C.C. · Billy · Shorty · Glasses · Boss Ember · Straggus · Mongo · Locke and Lode · Sedo · Sergeant Slug · Blakk Employees · Quentin · Maurice · The Game Master · Dark Servants · Spirex · The Emperor · Dai-Fu · Jonny Man · Tad
Recurring Gerhard Stocker · The Gentleman · Mario Bravado · Dana Por · Shockwire · King of Sling · Marcus · Gabe · Fav · Frost · Jacques · Waylon · Munch · Flame · Millard Milford · Swick · Drucilla · Underlord Sleade
Other Shanai · Tom Por · Turtleton
Gangs of SlugSlingers in SlugTerra
Heroes Shane Gang · The Resistance · The Outlaws
Villains Blakk Guards · The Hooligang · The Scrap Force · Viggo's Gang · Underlords
Other Power Triplets · McDougall Gang
Mecha-Beasts Models in SlugTerra
Western Mech Forge BOOM-R · FRND-O · LK-E · WY-8
Blakk Industries TH1-DR
Unknown Manufacture
Slugterra Series Listing
Season 1 "The World Beneath Our Feet Part 1" · "The World Beneath Our Feet Part 2" · "The Trade" · "The Slugout" · "Club Slug" · "The Slug Run" · "Mecha Mutiny" · "Deadweed" · "Shadows and Light" · "Mario Bravado" · "Endangered Species" · "Undertow" · "Dawn of the Slug" · "The New Kid Part 1" · "The New Kid Part 2" · "Snowdance" · "Inheritance" · "A Distant Shore" ·"The Journey Home" · "Roboslugs" · "The Unbeatable Master" · "Deep Water, Dark Water" · "The Gentleman and the Thief" · "No Exit" · "The Hard Part" · "What Lies Beneath" · "The Return" · "Slugball" · "King of Sling" · "Mission: Improbable" · "Keys to the Kingdom" · "The Thrill of the Game" · "Lightwell" · "It Comes by Night" · "Upgrade" · "Back to Blakk" · "Bandoleer of Brothers" · "Dark as Night" · "Light as Day"
Season 2 "Slugterra: Ghoul from Beyond" · "Slugterra: Return of the Elementals" · "Slugterra: Slug Fu Showdown"
Season 3 "Slugterra: Eastern Caverns" · "Second Chances" · "Get Pronto" · "Stuff of Legend" · "Eastern Tech" · "Slug Day" · "The Fall of the Eastern Champion" · "The Lady and the Sword" · "The Emperor Strikes Back" · "The Return of the Eastern Champion"
Season 4 "Slugterra: Into the Shadows"
Slugisodes Listing
Season 1 "Slugslinging 101" · "Blasters and You" · "How To Catch Slugs!" · "Our Friend The Slug" · "Care and Feeding of Slugs!" · "Slug Retrieval" · "Know Your Ghouls!" · "Choosing Slugs" · "Dr. Blakk: The Untold Story" · "Trading Slugs" · "The Underworld Beneath Your Feet" · "Getting Around in Slugterra" · "The Right Slug for the Right Job" · "A Brief History of Slugslinging" · "KYS: Tazerlings" · "Pack Your Slugs!" · "KYS: Arachnet!" · "KYS: Armashelt!" · "Slugs In The Wild" · "Fighting With Floppers" · "KYS: Be Creative" · "KYS: Aquabeek" · "Burpy in: Load 'Em Up!" · "KYS: Vinedrill" · "KYS: Xmitter" · "Spinner and Chiller in: Slug Shell Shocked" · "Burpy and Chiller in: Chill Time!" · "AYPG: The Rescue of Baby Windsor" · "AYPG: The Quest for the Golden Chalice" · "AYPG: That Day on the Road to Low Rise Cavern" · "Spinner in: Tangled Web" · "Slugs and Downtime" · "Fun Facts About Slugs" · "Stunts in: Slugs and Stripes" · "A User's Guide to Transforming Mecha Beasts" · "Burpy in: Mall Madness" · "Eat My Stank: The Physiology of the Flatulorhinkus" · "Buzzsaw in: Going to the Frientist" · A High-Speed Guide to Megamorph Acceleration"
Season 2 "Burpy and Friends Take a Dive" · "Noodle Strikes Back!" · "Bad Housekeeping" · "Box Party" · "Spooker!" · "Nothin' But a Slughound" · "Slug Selfies" · "Fly, Fly Again" · "Chow Time" · "Bee Cool, Dude" · "Wake Up Time" · "Hiccup!" · "BOO!" · "Smile!" · "Slug Sandwich" · "Snooze or Lose" · "Pass the Gas"
Season 3 "Joo-Joo in: Food Fight!" · "The Good, The Bad, and The Larry" · "Goober's Blowback" · "KYS: Armashelt (EXTREME)" · "KYS: Tazerlings (EXTREME) - Part 1" · "KYS: Tazerlings (EXTREME) - Part 2" · "Slug Fu & You!" · "Let Sleeping Prontos Lie" · "Larry, Stinky & Mo" · "Washed Up!" · "Picnic Problems!" · "Spitting Image!" · "Rookie In: Somebody's Watching Me" · "Be a Fan of the Fandango!" · "Megamorphs, Guardians, and Elementals!"
Season 4 "Slugs and Spares!" · "Photo Finished!" · "Slug Rally 5000!" · "Comin’ Achoo!" · "Trick or Cheat!" · "Slug Cappella!" · "Swashbuckling Slugs!"  · "Flopper Party!" · "On Thin Ice!"
Season 4 "SOTS: Joules Vs. Bludgeon Battle"