What a show – and on this week’s new episode, what a guest list. It includes Benedict Cumberbatch, about to star in Patrick Melrose on Showtime; Matt LeBlanc, who recently wrapped up his wildly entertaining (and self-deprecating) Episodes series, also on Showtime; and Mary Berry, famous in England (and here in the States) for what there was called The Great British Baking Show. Sounds like a recipe for a great hour of conversation…