Plot: This episode starts in the 1890s with bicycles and bloomers and then takes a look at boots, zippers, sewing machines, and infinitesimal difference. Speaking of small, we look at microscopic germs, polarised light, sugar, coal, iron, microbubbles, the spectroscope, night vision, beriberi resulting from polished rice, chickens, war rationing, and finally, we arrive at vitamins in a pill