Dr. Stone Season 4 Episode 4 English Dubbed Episode Title: Dr. X Episode Description: The scouting team continue their journey across the river while also discovering that there's another scientist here in America who managed to revive on their own somehow. They are suddenly attacked by the unknown assailant who is flying a plane. Taking matters into his own hands, Senku creates an acetylene gas grenade and gives it to Kirisame as she throws it at the plane, disabling its engines in the process. Following that, the unknown assailant crashes nearby, but manages to escape...