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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‘A Capitol Fourth’ celebrates Independence Day with host John Stamos

"A Capitol Fourth" continues its 39-year tradition of celebrating our nation’s independence on the West Lawn of the United States Capitol building.

"The Great British Baking Show": Amateur bakers rise to the top

All the decadent breads, cakes, pastries and pies take center stage for an encore of "The Great British Baking Show" each Friday night at 9 p.m. on Arizona PBS.

Doc Martin's eighth season comes to Arizona PBS

Doc Martin

Season eight finds Doc Martin and Louisa living together again with their infant son — but even after repairing their relationship, their problems are far from over. "Doc Martin" airs Saturdays at 7 p.m., beginning June 15.