ET EXCLUSIVES! Michael J. Fox on the darkest days of his Parkinson's battle. And, our best friends exclusive with Shannen Doherty and Sarah Michelle Gellar. Then, Matthew McConaughey gets candid. His revealing new book and what he just told us about his wife Camilla. And, Goldie Hawn and Kurt Russell share holiday secrets and preview “The Christmas Chronicles 2.” Plus, we’re flashing back with Eddie Murphy for our first time on the set of “Coming to America.”