What imaginative role can radio have in movement building today? Radio Free Three expands the boundaries of solidarity building across geographies, boundaries, and other lines of division within the Stop Line 3 movement—an ongoing protest against the pipeline proposed by a company responsible for the largest inland oil spill in the United States to transport nearly a million barrels of tar sands per day from Alberta, Canada to Superior, Wisconsin. New media theorist and practitioner John Kim reveals the processes of consensus building behind the development and operation of the radio station, which aspires to reach beyond the Upper Midwest by rebroadcasting content from around the world in solidarity with other decolonization and resistance movements.