Guy Fieri heads back to see what the Triple D Nation is cookin' up from under the sea. For starters, an oyster shuckin' shack is putting a new spin on an old favorite in the Big Easy. Plus, a family ran eatery has real-deal Italian from the pages of their grandmother's cookbook in Geyserville, California. Finally, you won't find any chips and salsa at this joint in Phoenix where Guy's sister-from-another-mister is whipping up legit Mexican straight from south of the border.