Dr. STONE Season 1 Episode 4
Fire the Smoke Signal
Senku has the idea of creating gunpowder to have a way to balance the scale and have a chance to defeat Shishio. The production of gunpowder causes a fire. Shortly thereafter, Senku and the others discover smoke signals on the horizon. An accident? Hardly likely. Apparently there are other people in the stone world ...
Guest Stars
Keiji Fujiwara
Byakuya Ishigami (voice)
Mikako Komatsu
Senkuu Ishigami (childhood) (voice)
Mutsumi Tamura
Taiju Ooki (childhood) (voice)
Genki Muro
Bad High School Student A (voice)
Yuya Murakami
Bad High School Student B (voice)