Overview: Bon Appétit’s Brad and Claire are back for a very special crossover episode (Part 1!) of It’s Alive. Claire says they’re making doughnuts with sourdough starter. Brad’s trying to make “sourdoughnuts” a thing. Who will win? You will: this episode had so many good Brad and Claire moments that we had to make it two parts. *Correction, let's make that three parts.