“Catalyst” explores cracks on the icy surface of Jupiter’s moon Europa that suggest an ocean swirls underneath.
“Molly of Denali” follows feisty 10-year-old Molly Mabrary and her adventures while living with her family in the fictional village of Qyah, Alaska. The series premieres July 15 on Arizona PBS.
Season eight finds Doc Martin and Louisa living together again with their infant son — but even after repairing their relationship, their problems are far from over. "Doc Martin" airs Saturdays at 7 p.m., beginning June 15.
This month, "American Masters" showcases three iconic chefs Sundays at 2 p.m. Explore their life stories, their love of cooking and what they brought to the world.