The North Country gets a lot of national stage time in Ben Stiller’s new seven-part prison drama, “Escape at Dannemora.” The series premieres this Sunday on the Showtime TV network. It’s the real-life story of Richard Matt and David Sweat, who broke out of Clinton Correctional Facility in 2015. Matt was killed in a shootout and Sweat was captured after a three-week manhunt. Last night, Stiller hosted a local premiere in Plattsburgh. Zach Hirsch was there.