Dr. Stone Season 3 Episode 21 English Subbed Episode Title: Treasure Island Episode Description: Senku's plan involves collecting skilled people and materials from all over the world, so they plan to leave after freeing everyone Ibara petrified. Soyuz decides to stay and is accepted as the new master. With Soyuz as an intermediary, the islanders become allies of the Kingdom of Science and begin construction of their own radio tower. To cement their friendship, Gen provides cotton candy, ramen, sushi, and other modern pleasures. Kirisame and Matsukaze agree to accompany Senku to other countries...