Vincent van Gogh looked at The Starry Night and saw a failure, a delusion, a canvas not worth the postage to ship to his brother. Drawing on his letters to Theo, 19th-century astronomical records, and modern neurological studies, this episode reconstructs the most turbulent year of his life: the ideological war with Paul Gauguin in Arles over painting from nature versus imagination, the December 1888 breakdown and the ear incident, and his voluntary admission in May 1889 to the Saint-Paul asylum in Provence.

We look at how a barred east-facing window and a separate ground-floor studio serialized his process, leading to 21 variations of the same view before he finally looked up. Astronomers have matched the bright orb beside the cypress to Venus at near maximum brightness in June 1889, while the crescent moon, the exaggerated cypress, and th ...