Adrian "Fletch" Fletcher is a fictional character from the BBC medical drama Casualty, portrayed by actor Alex Walkinshaw. He first appeared in the twenty-sixth series episode "Zero Sum Game", broadcast on 7 July 2012. Fletch was a Senior Staff Nurse in Holby City Hospital's emergency department. On 1 April 2014, Walkinshaw announced his departure from Casualty, but revealed that he would be reprising his role in spin-off show Holby City.