This is episode 36 of 80 of From Physician to the Crown. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The middle of the season, where the conflict escalates.
Chunyu Ge and her sister Chunyu Heng became palace physician-maids. When Chunyu Heng caught the emperor's eye, a jealous consort had her poisoned. Chunyu Ge vowed revenge, brought the consort down through her medical role, and rose to empress dowager, spreading her family's medicine to the people.