 A second crossover was commissioned in 2005 as part of the BBC's DoNation season.In August 2005, the station ran a week-long campaign to raise public awareness of organ donation, aiming to help viewers make an informed decision about whether to sign up to the Organ Donation Register.An interactive episode of "Casualty@Holby City" was one of the headlining shows of the season, allowing viewers to vote by phone to determine the outcome of a fictional organ donation.