Lloyd Rose is an American writer most associated with her work on various Doctor Who spin-offs. She has also written for the American television series Homicide: Life on the Street and Kingpin. She often jokes in her biographies that her name is the pen name of a writer called Sarah Tonyn (a pun on serotonin), although (despite the information on her IMDb entry) she has not had any professional writing published under this name. Source: Wikipedia (en)