Master Class, Vaudeville Theatre, London
Vaudeville Theatre, London: Terrence McNally's Master Class, a play that recreates a public teaching session by the late, great opera star Maria Callas, first came to the West End's Queen's Theatre in 1997, after its Tony-winning triumph on Broadway the year before. That production marked Patti LuPone's first return to London after the debacle of her ignominious firing from Sunset Boulevard four y…