Hope they have a television in the waiting room of your doctor’s office: Newsweek editor Jonathan Meacham is in talks to host a weekly program on PBS. The Friday night public-affairs program is called Need to Know. It will be co-anchored by Alison Stewart and debut on May 7 at 8:30. Meacham, in addition to editing Newsweek, won a Pulitzer last year for his biography of Andrew Jackson.