On the hit series “The Bear,” Liza Colón-Zayas plays a middle-aged line cook named Tina who’s challenged by her mentors to learn new skills as a sous-chef. In some ways, her character’s story mirrors her own journey as an actor. Liza joins Tom to talk about the scarcity and struggle she’s had to overcome on her path to her breakthrough role, how her setbacks continue to shape her as an artist, and how as an actor you can feel dispensable and invisible as you age.