 He wrote a two-part story for series four in 2008, titled "Silence in the Library" / "Forest of the Dead", making Moffat and series executive producer Russell T Davies the only writers to have contributed scripts to the first four series of the revived show. In March 2008, Davies said that he often rewrote scripts from other writers, but didn 't "touch a word" of Moffat's episodes. Moffat's script for series four secured him his fourth consecutive Hugo Awards nomination, though it did not win.
