In 1940 British critic James Agate said of John Gielgud’s King Lear: “I do not feel that this Lear’s rages go beyond extreme petulance—they do not frighten me!” No such reservation afflicts Gregory Doran’s intelligent and well-spoken Royal Shakespeare Company production, which stars Antony Sher as the king—the Shakespearean role that Sher, who last year played Falstaff at BAM, says will be his last.