Shakespeare’s King Lear is an epic parent-child drama and then some. The tragedy begins as fairy tale (“Once upon a time, there was an old king who had three daughters…”) and ends as a nightmare — of homelessness, alienation, family strife, and civil war. This production stars Acting Company members Sara Barker as Edgar, Frank Britton as Cornwall, Christopher Henley as the Fool, and Cam Magee as Gloucester.