 In November 2007, Kyle re-iterated that the separate series' 52-week filming schedules make it logistically difficult to produce crossovers, but revealed that the production teams were trying to create more opportunities for the two shows to merge.A new set of crossover episodes written by "Casualty" lead writer Mark Catley were planned for February 2010.In the event, however, the episodes which saw "Casualty" Charlie Fairhead (Derek Thompson) operated on by "Holby City" Elliot Hope (Paul Bradley) after suffering a heart attack were broadcast as regular "Casualty" and "Holby City" episodes, rather than under the "Casualty@Holby City" title.