Ep. 5: The Underground Boat Is...
Ipinalabas noong Mayo 14, 1981
5
Mga Episode
- Ep. 1 · 1999/09/09, 00:09:09
- Ep. 2 · The Infinite Universe
- Ep. 3 · Thieves of the Millennium
- Ep. 4 · A Meteorite Disappears
- Ep. 5 · The Underground Boat Is...
- Ep. 6 · The Underground City
- Ep. 7 · Invitation to the Secret Base.
- Ep. 8 · Crisis of the Underground Explosion
- Ep. 9 · Approaching the Mystery of the Big Cave.