Sonic Underground

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