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To Destroy and to Save (壊すもの救うもの Kowasu mono Sukū mono) is the thirty-third episode of the Dr. Stone anime, and the ninth episode of the second season.


The second part of the battle for the Cave of Miracles wages on, and the Kingdom must protect their scientists from the hands of Tsukasa and Hyoga. Meanwhile, Senku whips up some nitroglycerin to force a ceasefire. During the negotiations, it's revealed that Tsukasa has a younger sister who he was trying to care for in the hospital, and Senku offers to try and save her life in exchange for stopping the war.

Plot Details[]

With Tsukasa and Hyoga now on the field, the Kingdom of Science fights to protect the Cave of Miracles. Senku attempts to make a weapon of science while Chrome returns to the battlefield to hunt for anything useful. Hyoga easily takes on groups of villagers while Tsukasa destroys the shock cannon.

Senku and Gen making white crystals

Senku tries to make urea nitrate, an explosive, but the poop Gen collected for him was too old to work. Kinro and Ginro take on Tsukasa together while Magma launches a sneak attack from behind. Meanwhile, Kohaku goes toe to toe with Hyoga. Having given up on the urea nitrate crystals, Senku asks Gen if he happened to have any Sulfurina on him, which he responds he doesn't. A moment later, Chrome bursts in holding the remnants of their bluff bullet, containing sulfuric acid.

Senku mixes the nitric acid, sulfuric acid, and some soap together to create nitroglycerin. Taiju prevents Tsukasa from reaching the Cave of Miracles, just as Gen completes a few paper airplanes which Senku drips some nitroglycerin onto the nose of. They fly them over the battlefield, exploding safely away from the people but demonstrating their power. The battle is now at a standstill.

Mirai in a coma

Negotiations begin between the heads of each group, and Senku explains that Tsukasa's actions didn't match up with his old world persona. He deduces that Tsukasa's sister, Mirai, must still be alive, and offers to help Tsukasa find and revive her in exchange for stopping the war. Tsukasa agrees, and the Kingdom begins searching for the location of the hospital Mirai was staying at.

To help the mining, Senku uses dynamite to break apart the harder bedrock. Eventually, they find Mirai's statue.







Inventions and Discoveries[]

  • Nitroglycerin
  • Dynamite

Anime to Manga Differences[]

  • A scene of Gen and Tsukasa meeting in the old world is shown, a reference to one of the light novel stories.
  • An extra scene was added to show Tsukasa's early life and motivation to be the strongest MMA champion, as well as Mirai in the coma.
  • There's an additional scene where they're walking to the location of the hospital, where Tsukasa explains his motivation and why he broke statues despite being a "good guy."


  • In Tsukasa's flashback, one of his kicks is drawn wrong (he's got a right foot on his left leg).


  • The episode was named after Chapter 78.
  • The man paying Tsukasa for his fight is the same man who Yo tried to arrest for aiding with tax evasion in Episode 30.


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 35Ryusui3637383940
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
Episodes 4142434445464748495051525354
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169
Episodes 555657
South America Arc
Chapters 170171172173174175176177178179180181182183184185186187188189190191192193
New Stone World Arc
Chapters 194195196197198199200
Globetrotting Arc
Chapters 201202203204205206207208209210211212
Stone to Space Saga
Moon Mission Arc
Chapters 213214215216217218219220221222223224225226227228229230231232