Actress Katherine LaNasa is getting candid. In this exclusive interview, LaNasa opens up about why her role in "The Pitt" hits close to home — and how her own health struggles shaped the way she approached the character. She also takes a walk down TV memory lane, sharing behind-the-scenes stories from her favorite cameos on "Seinfeld" and "Two and a Half Men". Plus, she reveals the unexpected DM that kept her going — and answers the question we had to ask: if she could fire one person from her fictional staff, who would it be… and why?