Starting in 1955, columnist Esther "Ann Landers" Lederer led the liberalization of American life by favoring lawful prostitution, pro-choice politics, and the legalization of homosexual acts. She told men to grow up and women to take control of their destinies, and she was always willing to admit her mistakes. This was never truer than in 1975, when, after two decades of telling couples to soldier through their marital problems, she announced she was getting a divorce of her own. This solo show, starring the ebullient and charming Julie Briskman as Landers, is about that moment. (ACT Theatre, 700 Union St, 292-7676, 7:30 pm, $10–$50)