Sonic Underground Season 1 Episode 13
Artifact
The Hedgehogs steal historical artifacts of Mobuis from Robotnik before he can pawn them off at an auction. Sonic and Sonia take one of the pieces to a university professor who informs them that the artifact is actually a bomb from the Mobian war. The Hedgehogs must act fast to retrieve the bomb and protect the treasure that is the key to Mobius past.
1 - 40Virtual DangerOct. 22, 1999- 1 - 39The PendantOct. 21, 1999
- 1 - 38The Art of DestructionOct. 20, 1999
- 1 - 37Bartleby the PrisonerOct. 19, 1999
- 1 - 36SleepersOct. 18, 1999
- 1 - 35The Big MeltOct. 15, 1999
- 1 - 34Sonia's ChoiceOct. 14, 1999
- 1 - 33HealerOct. 13, 1999
- 1 - 32Haircraft in SpaceOct. 12, 1999
- 1 - 31Country CrisisOct. 11, 1999
- 1 - 30Harmony or Something (Origins, Part 3)Oct. 08, 1999
- 1 - 29New Echidna in Town (Chaos Emerald Crisis, Part 3)Oct. 07, 1999
- 1 - 28Getting to Know You (Origins, Part 2)Oct. 06, 1999
- 1 - 27
- 1 - 26Wedding Bell BluesOct. 04, 1999
- 1 - 25Flying Fortress (Chaos Emerald Crisis, Part 1)Oct. 01, 1999
- 1 - 24Six Is a CrowdSep. 30, 1999
- 1 - 23Hedgehog in the Iron MaskSep. 29, 1999
- 1 - 22Mummy DearestSep. 28, 1999
- 1 - 21Dunes DaySep. 27, 1999
- 1 - 20Three Hedgehogs and a BabySep. 24, 1999
- 1 - 19The Jewel of the CrownSep. 23, 1999
- 1 - 18When in Rome...Sep. 22, 1999
- 1 - 17Head GamesSep. 21, 1999
- 1 - 16Friend or Foe?Sep. 20, 1999
- 1 - 15Sonic TonicSep. 17, 1999
- 1 - 14Bug!Sep. 16, 1999
- 1 - 13ArtifactSep. 15, 1999
- 1 - 12A Hedgehog's Home Is Her CastleSep. 14, 1999
- 1 - 11Winner Fakes AllSep. 13, 1999
- 1 - 10Come Out Wherever You AreSep. 10, 1999
- 1 - 9The Last ResortSep. 09, 1999
- 1 - 8Who Do You Think You AreSep. 08, 1999
- 1 - 7The Deepest FearSep. 07, 1999
- 1 - 6Tangled WebsSep. 06, 1999
- 1 - 5Underground MasqueradeSep. 03, 1999
- 1 - 4The Price of FreedomSep. 02, 1999
- 1 - 3MobodoonSep. 01, 1999
- 1 - 2To Catch a QueenAug. 31, 1999
- 1 - 1Beginnings (Origins, Part 1)Aug. 30, 1999
