4. Memoirs of an Invisible Dan

Dan is about to be announced as author of Inside so he gives copies of the book to Blair, Serena, Nate, Chuck, and Rufus, hoping they will be supportive at his upcoming book party. In the book, Dan described Serena as the "old Serena": drinking, dating teachers, being shallow, partying, and reckless. Nate does not receive a character description, but is merged with Eric (a younger, gay character with political relatives). Chuck is described as being lonely, cynical and without any friends or family. The book talks about Blair and Dan having sex, and when Louis reads it he says he cannot trust Blair anymore.

Blair is afraid she will have to raise the baby on her own if he leaves her. In the end, Louis apologizes for his behavior and agrees to trust Blair. Even Rufus becomes angry and alienated with Dan when he says he had never regretted leaving the music industry to have a family, until upon reading the book, which portrays him as marrying Lily just for money. Meanwhile, Diana makes the connection of Ivy and Charlie being the same person and forces Charlie to work for her at The Spectator.

Also, Serena's boss tells her to get the film rights for Inside and that she has only one week, forcing Serena to choose between Dan and her career. Title reference: The 1992 film Memoirs of an Invisible Man.