Big X
S1 · E37 — The Secret Undersea Laboratory
S1:E37 · The Secret Undersea Laboratory
59 episodes in this season
Big X Appears!
25 min
The Attack of V3
Evacuation from the Fortress
Showdown in the Desert
The Crisis of Big X
Slave Hunting
Showdown at Death Lake
The Black Aurora
The Lion Empire
Sun of the Devil
Ocean's Grave
Showdown with "Kaiser O"
The Masked Man
The Poisonous Gas Train
Himmel, the Big Mysterious Bird
The Spaceman Sunaruri
The Weightless Line
Mystery of the Dead Volcano
The Spade Viking
Showdown 20 vs. 21
Run, Big X!
Big Mad Fountain
The Phantom Pirate Ship
The Robot Bombing Order
The King's Electricity Transmission Campaign
The Ant Lion Campaign
The Aerial City
Big Dragon God vs. Big X
The Antique Missile
Target That Ear
Rebellion of a Rubber Man
The Sad Insect Doctor
Salvage, the Vacuum Man
The Metropolis Destruction Campaign
The Robot Castle
The Fire Horse
The Secret Undersea Laboratory
The Space Tiger
The Light-Hearted Man
From Rainbow Country
Fountain of the Snowman
Toward the Galaxy
Dr. Pearl's Invention
Planet Angel
Nina in Crisis
The Secret of St. Rosa
The Secret of Spaceland
Showdown at the Grand Glacier
A Giant Jellyfish Appears
The Great 3
The Earth's 5th Ice Age
The Magician of Samaringa
The Stolen Experiment
Zombie, the Human-Faced Beast
The Miracle of the Coral Reef
Hans' Revenge
Black Cloud on the Amazon
Showdown on the Moon
The Final Showdown
