Cape Cod will get the first look at Jay Craven’s new movie, “Northern Borders,” which stars Bruce Dern and Genevieve Bujold. The film, based on a Howard Frank Mosher novel about a boy who goes to live on his grandparents’ Vermont farm, will screen Aug. 29 at Wellfleet Preservation Hall. Why Wellfleet? Craven’s family moved there in the 1960s, his brother Jody teaches fine metalwork and jewelry classes at Nauset Regional High School, and Craven rented surfboards at Surf City Cape Cod in the late ’60s. The movie was produced as the result of a partnership between Craven’s nonprofit Kingdom County Productions and Marlboro College in Vermont, where he teaches film. Next summer, Craven plans to screen “Peter and John,” which he shot last spring on Nantucket with actress Jacqueline Bisset.