Senku uses quartz sand to produce glass, which he uses to create glasses for the short-sighted Suika. Lacking the skills needed to blow useable lab utensils, Chrome brings in a skilled craftsman named Kaseki, who is able to quickly adapt to the unfamiliar substance. To break in their new lab, Senku offers to make Ginro a silver spear as part of a dangerous mission. (Source: Wikipedia)

Aired on: 9/12/2019