Nina Tassler leaving as CBS entertainment chief

Nina Tassler, one of the most prominent women in the television industry as CBS entertainment chairman since 2004, said Tuesday she will leave her job at the end of the year to pursue other creative interests. CBS has been the most-watched television network in prime time during virtually all of her tenure, and just last week completed the transition from David Letterman to Stephen Colbert for its late-night lineup. CBS announced Tuesday that Glenn Geller, one of her top deputies, has been promoted to CBS entertainment president to replace her. Tassler is the author of a book, "What I Told My Daughters: Lessons from Leaders on Raising the Next Generation of Empowered Women," to be published next April and is also writing a play. Tassler has ushered in some of television's most popular programs over the past decade, including "The Big Bang Theory," ''The Good Wife" and the "NCIS" franchise. CBS said she will continue with the company as an adviser through at least 2017. The two executives worked together at the Warner Bros. TV studio before coming to CBS.