Waterston joined the cast of the original NBC series in 1994 on a one-year contract. He wound up staying 16 years, until the series wrapped in 2010. Now the show's back — and so is he. We talk about working into his 80s, Grace and Frankie, and how the 1984 film The Killing Fields changed his life and career. Also, David Bianculli reviews Julia, a new HBO series about Julia Child.