“Seascape,” Edward Albee’s Pulitzer Prize winner, is onstage at Berkshire Theatre Group’s Unicorn Theatre in Stockbridge through Oct. 23. “Seascape” finds Nancy and Charlie, a middle-aged couple, on a deserted stretch of beach, relaxing after a picnic lunch, talking idly about home, family and their life together. She sketches, he naps, and then, suddenly, they are joined by two lizards who have decided to leave the ocean depths and come ashore. Eric Hill directs with BTG regulars David Adkins, Corinna May, Kate Goble and Tim Jones. For details: www.berkshiretheatregroup.org.

“The Mousetrap,” Agatha Christie’s iconic whodunit, opens Hartford Stage’s season, Oct. 13 to Nov. 6. The murder mystery premiered in London in 1952, and it has run continuously ever since, other than during the COVID-19 pandemic. Jackson Gay, who staged Hartford Stage’s “Make Believe,” directs. The cast of this sophisticated puzzler will include Brendan Dalton as Detective Sgt. Trotter, Yvette Ganier as Mrs. Boyle, Christopher Geary as Christopher Wren, Sam Morales as Mollie Ralston, Jason O’Connell as Mr. Paravicini, Tobias Segal as Giles Ralston, Ali Skamangas as Miss Casewell, and Greg Stuhr as Major Metcalf. For details without spoilers: www.hartfordstage.org.