William Emms was a scriptwriter who wrote for a variety of television programmes including The Revenue Men (1967-68), Callan (1969-70), Ace of Wands (1970), Z Cars (1965-71) and Crossroads (1980). In 1965, he wrote Galaxy 4, the first serial in the third season of Doctor Who. It was broadcast in four weekly parts from 11 September to 2 October. Emms wrote several further scripts for Doctor Who, but they were not commissioned. However, in 1985 his novelisation of Galaxy 4 was published as a Target book, and the following year, he wrote a novel in the Make Your Own Adventure with Doctor Who range of children's gamebooks, entitled Mission to Venus. He died in 1993.