|The Challenge Into Subterra|
|Ultraman, Episode 29|
|Screenplay by|| Ryu Minamikawa|
|Directed by||Samaji Nonagase|
|Special skill director||Koichi Takano|
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)
- Ultraman Volume 8 features Episodes 29-32.
- Ultraman The Complete Series features all episodes.