Of Science — 3 : Weapons

is the third episode of the first season of the popular sci-fi anime Dr. Stone . In this episode, the protagonist Senku Ishigami realizes that primitive strength is not enough to stop the antagonist Shishio Tsukasa, leading him to seek more advanced technological solutions to level the playing field.

Watch a recap of the tactical shifts and scientific breakthroughs in this episode: Dr. Stone: Season 1 Part 1 (Full Recap) YouTube• Nov 21, 2020 Episode Summary 3 : Weapons of Science

: Available on Crunchyroll and Amazon Prime Video . is the third episode of the first season

After Tsukasa reveals his murderous intent to "cull" the older generation, Senku determines that the only way to protect his friends and his goal of rebuilding civilization is through "weapons of science". Specifically, he targets the creation of as a deterrent. Key plot points include: Watch a recap of the tactical shifts and

: Senku identifies three essential ingredients for gunpowder: sulfur, charcoal (from burnt wood), and potassium nitrate (sourced from nitric acid found in the cave).

: Senku, Taiju, and Yuzuriha travel to Hakone to find a hot spring, which serves as a vital source of sulfur.