The newscast “Especial 9-N,” produced by TV3 (Catalonia) in association with TV3's news channel 3/24, presents transmediatic components by combining multiplatform journalistic coverage and citizen participation in online social media. The program aired on November 9, 2014, the date of the non-binding referendum on the sovereignty of Catalonia, held by Generalitat, the regional government. This chapter discusses in what measure the editorial strategy adopted optimized social engagement with the news and favored the circulation of broadcast journalism on online social media. The analysis was based on the systematic observation of the program and its records on online social media, to assess the nature and the intensity of the communicational activity. It was concluded that TV3's institutional identification with aspects related to the region's sovereignty, in the context of significant social mobilization around the theme, fostered transmedia circulation and social engagement with the news story.
