Holby City (series 1) "Holby City" was created by Tony McHale and Mal Young as a spin–off from the long–running BBC medical drama "Casualty". Young wanted to explore what happened to patients treated in "Casualty" once they were taken away to the hospital's surgical wards. While "Casualty" scope is limited to "accident of the week" storylines about patients entering hospital, "Holby City" allowed the possibility of storylines about long–term care, rather than immediate life and death decisions. Although both shows are set in the same hospital, the "Casualty" set in Bristol was not large enough to encompass the surgical ward and operating theatre required
Characters of Holby City the characters gathered together in the hospital bar at the end of the episode, and raised a toast "To the one and only Sandy!" Estelle "Essie" Harrison, played by Kaye Wragg, made her first appearance in the sixteenth series episode "My Name Is Joe", which aired on 6 May 2014. Essie is a Staff Nurse at Holby City Hospital. She came to the hospital with her dying grandfather and she started a relationship with Sacha Levy (Bob Barrett). She later moved to Germany after her grandfather died. In October 2014, it was announced that Wragg would be returning to "Holby