OR, Stacy Fischer excels as 17th-century writer Aphra Behn, trying to finish her first play amid constant distractions from King Charles II, the actress Nell Gwynne, and a former colleague from Aphra’s days as a spy. Through Nov. 6. Lyric Stage Company, Boston. 617-585-5678, www.lyricstage.com
THE DIVINE SISTER A wholly enjoyable spoof of nun-centric movies and plays, directed by Larry Coen and starring Jeffery Roberson, a.k.a. Varla Jean Merman, as the imperious but oddly endearing Mother Superior. Through Nov. 19. SpeakEasy Stage Company, Roberts Studio Theatre, Boston Center for the Arts. 617-933-8600, www.speakeasystage.com