Catalyst: Plastics and fertilizer in our oceans

“Catalyst” examines two major issues affecting the health of the world’s oceans: plastics and fertilizer.

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In this segment:

Charlie Rolsky

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'Durrells in Corfu' returns for a fourth season of family adventure

The Durrells in Corfu returns for a fourth season of eccentric family adventures on a Greek isle in the 1930s.

Explore the story of bluegrass in 'Big Family'

Examine the history of bluegrass music, from its origins to its eventual worldwide popularity, and hear from dozens of musicians who explain the ways bluegrass music transcends generational, cultural and geographic boundaries.

Explore the 'Magical Land of Oz'

Burrow into the magical depths of Australian animal life as unique species navigate extremes on land and sea on Wednesdays at 9 p.m., beginning August 28, on Arizona PBS.