“Catalyst” follows a team of scientists who while sequencing the Saguaro cactus made a surprising discovery. “Catalyst” also joins a Saguaro fruit harvest in the Saguaro National Forest.
It is 1848, and revolution is breaking out across Europe. In Britain, one woman stands between order and chaos. Sundays at 8 p.m., beginning Jan. 13.
Join Emmy and James Beard Award-winning chef Lidia Bastianich as she travels to the heartland of America Tuesday, Dec. 18, at 8 p.m., immersing herself in diverse cultures that provide inspiration for the holidays.
Re-watch Season 2 of the hit "Masterpiece" drama before Season 3 premieres in January.