Dame Helen Mirren, in her role as Cara Dutton in the series 1923, reflects on the insights she gained about America, particularly through her personal journey by train across the U.S. and the show's portrayal of the Dutton family's early 20th-century challenges. She highlights the complexity of America, both geographically and socially, and expresses gratitude for the role, seeing it as a valuable lesson in understanding the American experience.