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Also in this episode:

Catalyst: animal immune systems

In this segment:

Manuel Aviles-Santiago, PhD,
Tahora H. Nazer

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'The David Rubenstein Show' explores successful leadership

What makes a truly great leader? And how can leadership be developed into a force for true achievement? Washington, D.C.-based financier and philanthropist David Rubenstein sits down with influential figures to discuss their personal and professional choices and explore their paths to success.

'American Masters: Rothko' paints intimate portrait of legendary artist

One of the most influential artists of the 20th century, Mark Rothko’s signature style helped define Abstract Expressionism, the movement that shifted the center of the art world from Paris to New York. "American Masters — Rothko: Pictures Must Be Miraculous" premieres Friday, Oct. 25 at 8 p.m. on Arizona PBS.

'Jamestown' season 3 brings riches and rivalry

It's boom time in Jamestown, and Virginia promises riches and freedom. But old feuds remain, leading to a revenge plot, a tyrannical leader, and a clash between the English and Pamunkey. These conflicts will shape the New World for centuries to come.