Sonic Underground

Season 1 • 40 Episodes

1. Beginnings (Origins, Part 1)

2. To Catch a Queen

3. Mobodoon

4. The Price of Freedom

5. Underground Masquerade

6. Tangled Webs

7. The Deepest Fear

8. Who Do You Think You Are

9. The Last Resort

10. Come Out Wherever You Are

11. Winner Fakes All

12. A Hedgehog's Home Is Her Castle

13. Artifact

14. Bug!

15. Sonic Tonic

16. Friend or Foe?

17. Head Games

18. When in Rome...

19. The Jewel of the Crown

20. Three Hedgehogs and a Baby

21. Dunes Day

22. Mummy Dearest

23. Hedgehog in the Iron Mask

24. Six Is a Crowd

25. Flying Fortress (Chaos Emerald Crisis, Part 1)

26. Wedding Bell Blues

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

28. Getting to Know You (Origins, Part 2)

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

30. Harmony or Something (Origins, Part 3)

31. Country Crisis

32. Haircraft in Space

33. Healer

34. Sonia's Choice

35. The Big Melt

36. Sleepers

37. Bartleby the Prisoner

38. The Art of Destruction

39. The Pendant

40. Virtual Danger