Episode 1
Drawing on her family's rich barbacoa tradition, Cristina Martínez has become a Philadelphia food star -- and a voice for undocumented immigrants.
Episode 2
At Istanbul's Çiya, "food anthropologist" Musa Dagdeviren meticulously re-creates regional Turkish dishes in a bid to keep them from going extinct.
Episode 3
Frustrated by the dearth of authentic Thai cuisine, Bo Songvisava revives bold, complex local flavors in her sustainable Bangkok restaurant.
Episode 4
After years as the creative director of El Bulli, innovator Albert Adrià now presides over an "amusement park" of genre-bending Barcelona eateries.
