Also in this episode:

Catalyst: Racing against infectious diseases

Catalyst: inclusion and exclusion bias

Catalyst: Recycled asphalt

In this segment:

Rob Gray, Ph.D. associate professor and program chair, Human Systems Engineering

Catalyst: Recycled asphalt
Catalyst: Closer look at asteroid Bennu
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Celebrate Halloween with "Exhumed: A History of Zombies"

Go deep into the lore of the zombie throughout American history, examining zombie legends and tales to share what these creatures reveal about shifts in society, history and our deepest anxieties.

Independent Lens: 'Represent'

The Emmy Award-winning anthology series featuring unforgettable people, communities and moments in history returns to Arizona PBS on Mondays at 9 p.m.

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