In this segment:

Kamil Kaloush, School of Sustainable Engineering and the Built Environment

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'Nova' delivers stories from the front lines of science

"Nova" explores new discoveries and how we have come this far on Wednesdays at 8 p.m. on Arizona PBS.

'America's Test Kitchen' counts down most popular recipes for 20th anniversary

To celebrate 20 years of the most-watched cooking show on public television, "America's Test Kitchen" fans around the country voted for their all-time favorite recipes from the series. The results are presented now as Bridget Lancaster, Julia Collin Davison and their fellow cast members count down the series’ 20 most popular recipes and look back on the show's best moments.

Belgian detective drama 'Professor T' features crime-solving professor

Professor T

Fans of “Monk” and “House” will enjoy watching the eccentrically gifted professor, Professor T, unravel complex criminal puzzles for the police with his brilliant mind. The Belgian crime drama "Professor T" comes to Arizona PBS on Saturdays at 10 p.m. starting Nov. 9.