The Challenge Into Subterra
Ultraman, Episode 29
Goldon WOWOW
Air date 01/29/1967
Screenplay by Ryu Minamikawa
Tetsuo Kinjo
Directed by Samaji Nonagase
Special skill director Koichi Takano
Episode Guide
Human Specimens 5 & 6
Phantom of the Snow Mountains
Watch on Hulu

The Challenge Into Subterra (地底への挑戦 Chitei e no Chōsen) is the 29th episode of Ultraman. On the DVD release it is only called Challenge To The Underground.


After all of the gold in a mountain has disappeared it is revealed that a monster has been eating the precious metal.





  • Goldon (First and only appearance)

DVD Release

  • Ultraman Volume 8 features Episodes 29-32.
  • Ultraman The Complete Series features all episodes.

Ultraman Episodes
Birth of Ultraman | Ultra Operation No.1 | Shoot the Invaders! | Science Patrol, Move Out | Five Seconds Before the Explosion | Secret of the Miloganda | The Coast Guard Command | The Blue Stone of Baraji |The Lawless Monster Zone | Lightning Operation | The Mysterious Dinosaur Base | The Rascal from Outer Space | Cry of the Mummy | Oil S.O.S. | The Pearl Defense Directive | Terrifying Cosmic Rays | Science Patrol Into Space | Passport to Infinity | Brother from Another Planet | Demons Rise Again | Terror on Route 87 | Breach the Wall of Smoke | Overthrow the Surface | My Home Is Earth | The Undersea Science Center | Mystery Comet Typhoon | The Prince of Monsters: Part 1 | The Prince of Monsters: Part 2 | Human Specimens 5 & 6 | The Challenge Into Subterra | Phantom of the Snow Mountains | Who Goes There? | The Endless Counterattack | The Forbidden Words | Present from the Sky | The Monster Graveyard | Don't Shoot, Arashi! | The Little Hero | The Spaceship Rescue Command | Farewell, Ultraman