According to four network sources, there's talk inside Fox News that tonight's show could be his last. Lawyers for the law firm Paul, Weiss, hired last summer by 21st Century Fox to investigate Roger Ailes, are currently doing a "deep dive" investigation into O'Reilly's behavior. They're focused now on sexual harassment claims by O'Reilly guest Wendy Walsh after she reported her claims via the company's anonymous hotline.