This is an animated tv series that follows the adventures of Sonic the Hedgehog and his sister Sonia and Brother Manic. Freedom Fighters travel around Mobius to battle Robotnik's forces on a global scale; and that Robotnik has left most of the Mobian people unroboticised, leaving multiple cities, a poor underclass, and an aristocracy for the heroes to interact with.
Sonic Underground Season 1 (1999)
|1x01 Beginnings |
This is where Sonic Underground begins. We first see Sonic Manic and Sonia as babies/toddlers/children,then we see Sonic home with Uncle Chuck then he turns into a robot by Dr.Robotnik ...
|Aug. 30, 1999|
|1x02 To Catch a Queen |
Argus, the former captain of the Queen's guard, arranges a secret meeting with her. But he is soon intercepted by Robotnik's bounty hunters, Sleet and Dingo, who have every intention ...
|Aug. 31, 1999|
|1x03 Mobodoon |
Evading sleet and dingo, the hedgehogs fins themselves in a town completely untainted by robotnik's hand. Where the people are kind-hearted, and the food is free! Sounds like an ideal ...
|Sep. 01, 1999|
|1x04 The Price of Freedom |
Sonia gets down 'n' dirty with Sleet and Dingo [literately], and to freshen up, she and her brothers journey to east Mobius. There, Sonia is reunited with an old friend, Mindy Latour, ...
|Sep. 02, 1999|
|1x05 Underground Masquerade |
Manic begins to backslide to his old ways when the Sound Encounter, led by Max is back in town. Meanwhile, Sleet and Dingo are plotting to avoid giving the taxes they are collecting ...
|Sep. 03, 1999|
|1x06 Tangled Webs |
Whilst Sonia and Manic attempt to take out Robtonik's new SWATBOTS installation in a highly dangerous mission, Sonic is lapping it up at a nearby party! At the party, Sonic runs into ...
|Sep. 06, 1999|
|1x07 The Deepest Fear |
Sailing the Mobian seas, Captain Sonic is hot on the trail of the elusive creature, Moby Deep. He's close to capturing it too-until he is woken up by Manic. It was all a dream. After ...
|Sep. 07, 1999|
|1x08 Who Do You Think You Are |
The Sonic Underground arrive in Mobia in search of the Queen's Journal. In the city Sonia loses her memory and meets Raphi, one of the town's resistance...
|Sep. 08, 1999|
|1x09 The Last Resort |
The hedgehogs come across Lake Valley, a beautiful resort. But how can it be beautiful when Robotnik's controlling the rest of Mobius? The band's about to find out...
|Sep. 09, 1999|
|1x10 Come Out Wherever You Are |
Sonia has been invited to a debutante ball, arranged by none other than Robitnik's right hand man Bartleby! Sonic helps her in getting there without being caught, but even more problems ...
|Sep. 10, 1999|
|1x11 Winner Fakes All |
Robotnik has created a super-fast robot, and he's organised a race for the top athletes of Mobius and the robot. But it's all a trap to drive Sonic out into the open... can he resist ...
|Sep. 13, 1999|
|1x12 A Hedgehog's Home Is Her Castle |
Sonia inherits a spooky castle, but all is not as it seems when they stay there overnight...
|Sep. 14, 1999|
|1x13 Artifact |
In order to make a lot of money, Robotnik sells artifacts to the nobility of Mobius. But these artifacts are actually from more recent history; they are bombs, and they're about to ...
|Sep. 15, 1999|
|1x14 Bug! |
The band finds a village that has been destroyed by its Freedom Fighter occupants. Why has this happened? It seems to be something to do with the Flybots all over the desert, as Manic ...
|Sep. 16, 1999|
|1x15 Sonic Tonic |
Using the essence of a rare plant, Robotnik manages to make Sleet and Dingo fast-- maybe even faster than Sonic. The Sonic Underground manage to get hold of it, but can Sonia and Manic ...
|Sep. 17, 1999|
|1x16 Friend or Foe |
The band visit the Floating Island in search of their mother. There they meet Knuckles the Echidna, the island's guardian, who has been told by Sleet and Dingo that the Sonic Underground ...
|Sep. 20, 1999|
|1x17 Head Games |
Queen Aleena sends her children over to Speedster Island, a place Bartleby is trying to turn into a holiday resort. Sleet and Dingo are pretending to help, but they just want to robotocise ...
|Sep. 21, 1999|
|1x18 When in Rome |
The oracle, wishing to test the Hedgehog's practical capabilities, strips them of their powers and sends them into an alternate, roman-themed reality where a Sleet-look-alike presides ...
|Sep. 22, 1999|
|1x19 The Jewel in the Crown |
Aleena's Royal Jewel can trace the Queen like a homing device.... now, I wonder who might be interested in that? As the siblings follow Mother and Robonik follows them, the elusive ...
|Sep. 23, 1999|
|1x20 Three Hedgehogs and a Baby |
While in Robotropolis, Sonic & co. find an abandoned baby hedgehog. While Sonic and Sonia search for its parents, Manic is left to mind it, and get in touch with his mothering instincts....or ...
|Sep. 24, 1999|
|1x21 Dunesday |
This episode opens with the SU van going through the desert, in search of the nomadic tribe. It's so hot that Sonia has to use sunscreen and an electric fan, even inside the van! Suddenly ...
|Sep. 27, 1999|
|1x22 Mummy Dearest |
After stealing back a book engraved with the royal seal from Robotnik, the sonic trio discover that a prophet had foreseen Robotnik's takeover of Mobius, and has also foreseen his defeat! ...
|Sep. 28, 1999|
|1x23 The Hedgehog in the Iron Mask |
In this episode the Sonic Underground rescue a prisoner from one of Robotnik's old prisoners - a hedgehog wearing a mask (so you can't see his face properly). The prisoner claims he ...
|Sep. 29, 1999|
|1x24 Six Is a Crowd |
In this episode, the Sonic Underground go and see the Oracle (again), who sends them to an alternate dimension, where they are the bad guys, and Robotnik is the good guy! But once Robotnik ...
|Sep. 30, 1999|
|1x25 Flying Fortress |
Robotnik creates a new flying fortress to lay waste to the planet. When the Sonic Underground suspects that the Chaos Emerald is keeping the fortress aloft, they head to the Floating ...
|Oct. 03, 1999|
|1x26 Wedding Bell Blues |
When Robotnik announces he plans to marry Queen Aleena, the shocked sonic siblings race to the rescue, unaware it's a trap..
|Oct. 04, 1999|
|1x27 No Hedgehog Is an Island |
After taking off with the Chaos Emerald, Sleet and Dingo have a quibble over it, ending with Dingo accidentally breaking it and unleashing all the chaos energy. The Sonic Underground ...
|Oct. 05, 1999|
|1x28 Getting to Know You |
The newly reunited Sonic Siblings must learn to work as a team if they are to do battle with Robotnik. But do they really know each other well enough?
|Oct. 06, 1999|
|1x29 New Echinda in Town |
Knuckles bargains with Robotnik in order to recover and repair the Chaos Emerald before Mobius is destroyed, but to acquire the villain's help, the echidna must betray the Hedgehog ...
|Oct. 07, 1999|
|1x30 Harmony or Something |
Sonic, Sonia and Manic put their training to the test as they embark on a mission to rescue the Oracle from Robotnik! Can they work together in harmony, or will their lacking seal their ...
|Oct. 10, 1999|
|1x31 Country Crisis |
The Sonic Underground are on a mission to stop a group of hillbillies from feuding so they can stop Robotnik's dam-building project from flooding the countryside.
|Oct. 11, 1999|
|1x32 Haircraft in Space |
A salon robot is hypnotizing people that go to her salon into revealing deep secrets. When Sonia goes, she spills information about the resistance! Can she and her brothers keep Robotnik ...
|Oct. 12, 1999|
|1x33 Healer |
A Mobian named Titus creates a machine that can de-robotisize robots, called, appropriately enough, the De-Robotisizer. But when Robotnik and his crew go after it, it may do more harm ...
|Oct. 13, 1999|
|1x34 Sonia's Choice |
Sonic and Manic have been captured and are about to be robotisized! It's up to Sonia to save her brothers. But the thing is, they're in seperate robotisizers at opposite ends of the ...
|Oct. 14, 1999|
|1x35 The Big Melt |
Robotnik comes up with his most original plan yet: melt the polar ice caps. Things will be hard for the Sonic Underground when Sonia gets split up from the group and mistaken for Queen ...
|Oct. 17, 1999|
|1x36 Sleepers |
Robotnik invents a new dart that induces sleep and sends them after the resistance. It's up to Sonic and sibs to stop them from the source.
|Oct. 18, 1999|
|1x37 Bartleby the Prisoner |
Bartleby is placed under arrest for helping out the resistance. As you might expect, it's the Sonic Underground to the rescue!
|Oct. 19, 1999|
|1x38 The Art of Destruction |
The Sonic Underground come across ART, Robotnik's most powerful robot ever, that can think and learn for itself. But ART soon learns the power of friendship...
|Oct. 20, 1999|
|1x39 The Pendant |
Sonia finds a magic pendant that threatens to turn her invisible.
|Oct. 21, 1999|
|1x40 Virtual Danger |
Sonic and Manic play a game of virtual reality to enhance their pilot skills. When the two brothers decide to put their practice to use, they fly in a successful mission that intercepts ...
|Oct. 24, 1999|
Season 1 Characters[none added]
Season 1 Videos[none added]
Season 1 Trivia[none added]
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