If you were feeling sickly 100 years ago, your doctor might have prescribed a loincloth, a bed, and a sun-drenched balcony in the Swiss Alps. No blood tests or scans — your degree of tan would determine your prognosis.

From sun worship to sun-gazing to Coco Chanel accidentally making bronzed skin chic, this episode explores the many ways medicine and mankind have misunderstood the sun.