Bell, who joined The Tonight Show as showrunner last fall, will be replaced on an interim basis by Gavin Purcell. A former Late Night producer, Purcell helped launch Jimmy Fallon's Tonight Show and most recently served as showrunner on Sarah Silverman's I Love You, America. Bell said in a statement that he had only committed to serve as showrunner for a year. "The past year with Jimmy and the terrific team at the show has been a blast, and I will always be grateful for this opportunity," Bell said. "But after serious contemplation, I realized I did not want to extend my time at the show. Those thoughts are part of larger ones I have been having about my career, and what has emerged for me is a strong desire to delve into something new — to build on my experience in news, sports, and entertainment so I can broaden and deepen my leadership role in the content universe."