Catalyst: The Alzheimer’s brain

What are researchers learning from Alzheimer’s victims in life and after death? Dr. Thomas Beach explains how brain and body donation is vital to effective Alzheimer’s Research.

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'Victoria' Season 3: A fearless monarch faces down crisis

Victoria Season 3 on Masterpiece begins Sunday Jan. 13 at 8 p.m.

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.

'Nova' returns this winter with new episodes Wednesday nights

From volcanoes to space exploration, "Nova" explores our world every Wednesday at 8 p.m. on Arizona PBS.

'Nature' returns with new journeys this winter

From foxes to prehistoric creatures, experience the splendors and compelling stories of the natural world from all over the globe as "Nature" returns to Arizona PBS Wednesday nights at 7 p.m. this winter.