Breaking Borders Season 1 Episode 4 Tunnel of Hope in Sarajevo ( Air Date 2015-04-05 ) Genre Reality category. Overview "Mariana and Michael visit Sarajevo to grasp how three groups co-exist after ethnic cleansing wiped out thousands. They walk down Sniper Alley, visit the "Tunnel of Hope," and hear the story of the Romeo and Juliet of Sarajevo.".