The second half of the episode shifts to a flashback showing Senku’s first months in the stone world.

The episode picks up immediately after Tsukasa delivers what appears to be a fatal blow to Senku’s neck. Critics from DoubleSama note that the physics of Tsukasa’s weapon should have caused far more damage, but the show uses this moment to showcase Senku’s tactical foresight.

Taiju and Yuzuriha deduce that pouring the miracle fluid on this specific spot could trigger a healing reaction, effectively "reviving" Senku.

For deeper discussions, you can find active community threads on Reddit's Dr. Stone Episode 5 Discussion .

Reviewers at Crow's World of Anime highlight how this moment elevates Taiju and Yuzuriha from "damsel" or "brute" archetypes into competent, quick-thinking allies. A Look into the Past: Senku’s First Days