“As [Kelvin Moon] Loh sees it, the new show preserves the integrity of Gilbert & Sullivan’s composition while stripping away the irrelevant junk that has crept into productions over the years. … There are no taped-back slant eyes or faux-hawkish Samurai hairlines, just stage makeup and severe Victorian middle-parts.” The key device is a newly-created prologue featuring Gilbert, Sullivan, and producer Richard D’Oyly-Carte themselves.