Set in Amsterdam, new series "Van Der Valk" follows the work of Commisaris Van der Valk (played by Marc Warren), a street-smart and unapologetic Dutch detective who navigates the lively and enigmatic city, solving mysterious crimes using astute human observation and inspired detection.
After seven years of marriage, Alan and Celia discover that wedded bliss isn't always blissful. Clashing politics, Alan's new job and a wild local lad create tension. Caroline gets emotionally embroiled at work. Alan's brother visits. See what else unfolds in season four of "Last Tango in Hailfax."
"Nova" explores new discoveries and how we have come this far on Wednesdays at 8 p.m. on Arizona PBS.