S1, E4: Joanna’s epic adventure along the Danube comes to an end in beautiful Romania. Journeying by houseboat, she travels into the vast wilderness of the Danube Delta. Here, she sees the wonderful birdlife, encountering flocks of majestic white pelicans. In the dead of night, Joanna comes face to face with another of the Delta’s iconic species, jackals, before she reaches the Black Sea coast.