In its Cannes gestation it was presented in two parts ( though neither part bore an official title here ) , each slightly more than two hrs . : The Argentine , which covers Guevara 's role in Fidel Castro 's 1958 campaign across the Cuban jungle , ending in the flight of President Batista and the ascendency of Castro ( Demian Bichir ) ; and Guerilla , detailing Che 's failed , ultimately fatal attempt to bring revolution in Bolivia .