High Quality Content by WIKIPEDIA articles! Casualty is the world`s longest-running television emergency medical drama, first broadcast in 1986 and transmitted in the UK on BBC One. The show`s characters are all staff within the fictional Holby City Hospital, composed of doctors, nurses, paramedics, and hospital management. The only current character remaining from the show`s conception is nurse Charlie Fairhead, played by Derek Thompson. The following characters appear regularly in the programme as of 2010.