Adventures of Sonic the Hedgehog
Season 1, Episode 9: Subterranean Sonic
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Sonic and Tails escape underground from Scratch and Grounder, but they are held captive there by a miserly mole named Spelunk.
All Episodes - Season 1
Episode 1
Best Hedgehog
Episode 2
Tails' New Home
Episode 3
Birth of a Salesman
Episode 4
Submerged Sonic
Episode 5
Pseudo Sonic
Episode 6
Over the Hill Hero
Episode 7
Robolympics
Episode 8
Lovesick Sonic
Episode 9
Subterranean Sonic
Episode 10
Grounder the Genius
Episode 11
High Stakes Sonic
Episode 12
Blank-Headed Eagle
Episode 13
Boogey-Mania
Episode 14
Big Daddy
Episode 15
The Robotnik Express
Episode 16
Mama Robotnik's Birthday
Episode 17
Slowwww Going
Episode 18
So Long Sucker
Episode 19
Robotnik's Rival
Episode 20
Trail of the Missing Tails
Episode 21
Momma Robotnik Returns
Episode 22
Too Tall Tails
Episode 23
Super Special Sonic Search & Smash Squad
Episode 24
Magnificent Sonic
Episode 25
Zoobotnik
Episode 26
Tails in Charge
Episode 27
Musta Been a Beautiful Baby
Episode 28
Sonic the Matchmaker
Episode 29
Attack on Pinball Fortress
Episode 30
The Last Resort
Episode 31
Coachnik
Episode 32
Sonic Gets Thrashed
Episode 33
Close Encounter of the Sonic Kind
Episode 34
Tails Prevails
Episode 35
Robotnik, Jr.
Episode 36
The Magic Hassle
Episode 37
Blackbot the Pirate
Episode 38
Hedgehog of the "Hound" Table
Episode 39
Robotnik's Pyramid Scheme
Episode 40
Prehistoric Sonic
Episode 41
Untouchable Sonic
Episode 42
Sonic Breakout
Episode 43
Sonically Ever After
Episode 44
The Mystery of the Missing Hi-tops
Episode 45
Super Robotnik
Episode 46
Mass Transit Trouble
Episode 47
Spaceman Sonic
Episode 48
MacHopper
Episode 49
Baby-Sitter Jitters
Episode 50
Full Tilt Tails
Episode 51
Lifestyles of the Sick and Twisted
Episode 52
Road Hog
Episode 53
The Mobius 5000
Episode 54
Honey, I Shrunk the Hedgehog
Episode 55
Sonic's Song
Episode 56
Sno Problem
Episode 57
Sonic Is Running
Episode 58
Mad Mike, Da Bear Warrior
Episode 59
Robotnikland
Episode 60
The Little Merhog
Episode 61
Robo-Ninjas
Episode 62
Fast and Easy
Episode 63
Tails' Tale
Episode 64
The Robots' Robot
Episode 65
Hero of the Year