Sonic Underground

S1 E361999

Sleepers

Episode Synopsis

On a mission in a distant sector of Robotropolis, the Hedgehogs are informed that freedom fighters have disappeared and are going to be roboticized. Sonic races to save his friends, but he is too late. The group of freedom fighters have been robotisized, including Cyrus' father.

Next Episodes

All Seasons

Beginnings (Origins, Part 1)

Episode 1

To Catch a Queen

Episode 2

Sonic Underground

Sleepers

Episode Synopsis

Next Episodes

Beginnings (Origins, Part 1)

To Catch a Queen

Mobodoon

The Price of Freedom

Underground Masquerade

Tangled Webs

The Deepest Fear

Who Do You Think You Are

The Last Resort

Come Out Wherever You Are

Winner Fakes All

A Hedgehog's Home Is Her Castle

Artifact

Bug!

Sonic Tonic

Friend or Foe?

Head Games

When in Rome...

The Jewel of the Crown

Three Hedgehogs and a Baby

Dunes Day

Mummy Dearest

Hedgehog in the Iron Mask

Six Is a Crowd

Flying Fortress (Chaos Emerald Crisis, Part 1)

Wedding Bell Blues

No Hedgehog Is an Island (Chaos Emerald Crisis, Part 2)

Getting to Know You (Origins, Part 2)

New Echidna in Town (Chaos Emerald Crisis, Part 3)

Harmony or Something (Origins, Part 3)

Country Crisis

Haircraft in Space

Healer

Sonia's Choice

The Big Melt

Sleepers

Bartleby the Prisoner

The Art of Destruction

The Pendant

Virtual Danger

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