Sonic Underground: 1x36
Sleepers
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.
1 - 1Beginnings (Origins, Part 1) Aug. 30, 1999- 1 - 2To Catch a Queen Aug. 31, 1999
- 1 - 3Mobodoon Sep. 01, 1999
- 1 - 4The Price of Freedom Sep. 02, 1999
- 1 - 5Underground Masquerade Sep. 03, 1999
- 1 - 6Tangled Webs Sep. 06, 1999
- 1 - 7The Deepest Fear Sep. 07, 1999
- 1 - 8Who Do You Think You Are Sep. 08, 1999
- 1 - 9The Last Resort Sep. 09, 1999
- 1 - 10Come Out Wherever You Are Sep. 10, 1999
- 1 - 11Winner Fakes All Sep. 13, 1999
- 1 - 12A Hedgehog's Home Is Her Castle Sep. 14, 1999
- 1 - 13Artifact Sep. 15, 1999
- 1 - 14Bug! Sep. 16, 1999
- 1 - 15Sonic Tonic Sep. 17, 1999
- 1 - 16Friend or Foe? Sep. 20, 1999
- 1 - 17Head Games Sep. 21, 1999
- 1 - 18When in Rome... Sep. 22, 1999
- 1 - 19The Jewel of the Crown Sep. 23, 1999
- 1 - 20Three Hedgehogs and a Baby Sep. 24, 1999
- 1 - 21Dunes Day Sep. 27, 1999
- 1 - 22Mummy Dearest Sep. 28, 1999
- 1 - 23Hedgehog in the Iron Mask Sep. 29, 1999
- 1 - 24Six Is a Crowd Sep. 30, 1999
- 1 - 25Flying Fortress (Chaos Emerald Crisis, Part 1) Oct. 01, 1999
- 1 - 26Wedding Bell Blues Oct. 04, 1999
- 1 - 27No Hedgehog Is an Island (Chaos Emerald Crisis, Part 2) Oct. 05, 1999
- 1 - 28Getting to Know You (Origins, Part 2) Oct. 06, 1999
- 1 - 29New Echidna in Town (Chaos Emerald Crisis, Part 3) Oct. 07, 1999
- 1 - 30Harmony or Something (Origins, Part 3) Oct. 08, 1999
- 1 - 31Country Crisis Oct. 11, 1999
- 1 - 32Haircraft in Space Oct. 12, 1999
- 1 - 33Healer Oct. 13, 1999
- 1 - 34Sonia's Choice Oct. 14, 1999
- 1 - 35The Big Melt Oct. 15, 1999
- 1 - 36Sleepers Oct. 18, 1999
- 1 - 37Bartleby the Prisoner Oct. 19, 1999
- 1 - 38The Art of Destruction Oct. 20, 1999
- 1 - 39The Pendant Oct. 21, 1999
- 1 - 40Virtual Danger Oct. 22, 1999