TV writer Nell Scovell’s credits include ‘The Simpsons,’ ‘Murphy Brown,’ ‘Late Night with David Letterman’ and ‘NCIS.’ When she started working in TV in the late 1980’s, more often than not, she’d be the only woman in the writers room. And in a lot of places, she's found, that's still the case. She tells us about calling out Letterman in Vanity Fair and shares stories from her new book ‘Just the Funny Parts.’