This episode is about windows. The giant windows in the home of the garden designer Saito Taichi provide stunning views of 50 different plants; the owner said that he wanted an ant's perspective. The architect Yoshimura Junzo (1908-1997) designed a whole series of windows in Karuizawa inspired by the great Frank Lloyd Wright, who favored large windows for admiring one's natural surroundings. We visit a library whose windows give the impression of being onboard a starship. We look at another type of fascinating window, the oculus, which features prominently in the Pantheon in Rome, as well as in a Buddhist temple in Kamakura. Sen So-oku, the tea master of the Mushakouji-Senke school, talks about how windows feature in the places used for tea ceremonies.