We welcome a true "Superstar" on the latest episode, the one and only Molly Shannon! She's one of the greatest comic actors ever. Shannon just wrote a book. It's called Hello, Molly: A Memoir. In the book, Molly Shannon shares her life story. She writes about her time on Saturday Night Live, but also her childhood. Shannon's mother, younger sister and cousin died in a car accident when Molly was four years old. Her father, who survived the crash and raised Molly, was driving under the influence. The book is harrowing and hilarious, heartbreaking and heartwarming. Shannon talks with Jesse Thorn about the new book. Plus, what it took to bring Mary Katherine Gallagher to SNL – she explains why it was anything but easy.