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Steam Gorilla is the twenty-ninth episode of the Dr. Stone anime, and the fifth episode of the second season.


The final touches to the automobile are made and it is used to transport the science supplies to a fortified cliffside that's close to the Tsukasa empire. From there the automobile is upgraded into a tank, but unbeknownst to the rescue group preparations by the empire have been made to counter any vehicular attack.

Plot Details

Magma unconscious.png

With the newly created Steam Engine running out of control, Magma steps up to the plate to try and stop it, but is instead knocked unconscious by it. Senku dubbing the Steam Engine a "Steam Gorilla" plan on invading the Tsukasa Empire. At said empire, Chrome is imprisoned and Hyoga inquires Tsukasa why is their prisoner's prison fortification so inadequate, to which he realizes something's up.

Meanwhile, Gen tries out the prototype car to which he proclaims the handling and the car itself is far too shaky. Wanting to know why he was the test driver, Senku details that it was because before the petrification, Gen was the only one with a drivers license. Stating that they won't be driving on paved roads, the village children weave bamboo tires. Once they're finished, the Automobile is created. As everyone in the village is impressed by the Automobile, Kaseki is sad that Chrome isn't there. Not just because they miss him, but also because he's not around to help build it. Once they're ready, Senku orders the villagers to load up the automobile with the science supplies and elderly. An old man by the name of Natri, speaking on behalf of the elders says they'll stay behind, and they know Senku mostly built the automobile because of their limited mobility. Although the villagers are worried that the empire might invade in their absence, they're confident that Senku will defeat them. Wasting no more time, the villagers in fighting condition march forth to the Tsukasa empire will the Kingdom of Science flag in hand.

The Steam Gorilla is pushed up a hill.png

On route to the Empire, everything progresses smoothly until they reach a steep hill which everyone has to try and push the automobile up the incline. From a conversation with Kaseki, Senku gets an epiphany on how the single cylinder engine they built does not deliver power continuously, and relies on inertia to complete every other half turn; therefore the automobile is unable to continuously power up the hill without assistance.

Eventually, the group reaches a fortified cliff area where they make camp. Acting as a look out for the camp, Kohaku lays at a cliff edge observing the empire through telescope. She is shocked when through the scope she spots Suika, who's decided herself to go on a reconnaissance mission to locate where Chrome is being imprisoned. Arriving at the camp, Chrome spots her in the distance and makes a scene to expose his location. Knowing where Chrome is located within the empire, Suika reports her findings back to the camp. Following Magma's suggestion by charging into the camp, Senku compliments the idea, and reveals they're going to upgrade the Steam Gorilla to become a tank. Initially, Kaseki is against the idea, but is persuaded after learning the automobile will power up because of it. Instead of using iron, paper will be used to fortify the tank.

Magma is unimpressed.png

The women then collect weeds in the surrounding area, which are then boiled in sodium hydroxide to loosen their fibers up. They're then washed, pressed and dried. Now with paper, Senku creates a paper shield and orders everyone to fortify the Steam Gorilla with paper shields. Kinro then opines his dissatisfaction with paper shields protecting them when they're so flimsy compared to what they're going up against. To prove his point, Senku fights against Kinro using a single paper shield against his spear. Amazingly a single powerful thrust from the spear doesn't break the paper shield whatsoever. This was due to Senku using plastic on the shield as an adhesive, creating a laminated shield that was flexible, durable and lightweight; effectively a primitive version of modern carbon fiber reinforced plastics. Soon, the upgrades to the Steam Gorilla are made and the invasion into Tsukasa Empire is near.

Back at the empire, Chrome learns that several pitfall spike traps are now laid across the area and that Tsukasa is aware that Senku would create a tank to use rescue Chrome. To help Senku and the others, Chrome plans to make a breakout from his prison.



Inventions and Discoveries

  • Woven Wheels
  • Automobile
  • Paper
  • Carbonfibre Shielding
  • Armored Vehicle

Anime to Manga Differences

  • The first scene of Chapter 69 was extended.
  • There was an additional scene of some of Tsukasa's men throwing Chrome into his cell, and a short conversation between Hyoga and Tsukasa outside.


  • In several scenes, the lower half of Magma's hair is missing (after being hit by the vehicle and when not recognizing the usefulness of paper).

Site Navigation

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Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 20212223242526272829303132333435
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Episodes 35Ryusui
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
New Stone World Arc
Chapters 194195196197198199200
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Stone to Space Saga
Moon Mission Arc
Chapters 213214215216217218219220221222223224225226227228229230231232