After her work on "Buffy", she wrote and produced episodes of "The O.C." and "Gilmore Girls" among other series. From 2006 to 2010, Espenson worked on "Battlestar Galactica" and many of its supplementary works. Between 2009 and 2010, she served on "Caprica", as co-executive and executive producer and co-showrunner. In 2010, she wrote an episode of HBO's "Game of Thrones", eventually earning a Writers' Guild Award for her involvement with the show. In 2011 she joined the writing staff for of the British television program "Torchwood", which aired on BBC One in the United Kingdom and Starz in the United States during mid-2011.