Although Elizabeth Montgomery rarely singled out a definitive “favorite” episode in interviews, those who knew her closely—including co-stars, writers, and her producing partner William Asher—consistently pointed to “Sisters at Heart” (Season 7, Episode 13, aired December 24, 1970) as the episode she held in highest regard. More than just a standout installment of a fantasy sitcom, this episode embodied the values Montgomery cherished most: compassion, equality, and the power of storytelling to