"Hello, I Must Be Going" is the 995th episode of Casualty and the 34th episode of the 30th series. It was preceded by "Tangled Webs We Weave" and followed by "Chain Reaction". The episode was directed by Steve Hughes and written by Jeff Povey. It features the first appearance of consultant Elle Gardner, portrayed by Jaye Griffiths. In addition, the episode features the final appearance of long running character Zoe Hanna portrayed by Sunetra Sarker, who joined the show in December 2007.