Steven Moffat is a British television writer and producer, best known for his work on the popular science fiction series Doctor Who. He joined the show in 2005 and became the head writer and showrunner from 2010 to 2017, during which he introduced iconic characters and story arcs. In addition to Doctor Who, Moffat co-created the acclaimed detective series Sherlock, which reimagines the classic character Sherlock Holmes in a modern setting. His writing is characterized by clever plots, intricate storytelling, and a knack for blending humor with drama.