By KATIE WALSH Tribune News Service February 17, 2021 49 Noel Coward’s 1941 play “Blithe Spirit” is classic material: a comic screwball play about a mystery novelist who is haunted by his ex-wife, summoned by a medium while trying to work through his writer’s block. The play has been staged numerous times on the West End and on Broadway since its debut, adapted to a musical (“High Spirits”) and filmed as a movie in 1945, starring Rex Harrison. The ongoing revival continues with Edward Hall’s film version, starring Dan Stevens, Isla Fisher and Leslie Mann. Dan Stevens, left, and Leslie Mann in “Blithe Spirit.” (Courtesy of IFC Films/TNS)