Whoa. Last night, my husband and I finished watching the final season of Mr. Selfridge. We’re a little behind the rest of you who watched it unfold each Sunday night in real time. We recorded all the shows and spent the last couple of weeks watching an episode about every other night. A big fan of Downton Abbey, we also watch Grantchester, Call the Midwife, and Poldark all on PBS. The quality of programming and the level of acting in these series are superior. I’d taken the liberty of reading about the real Harry Gordon Selfridge, the American business man who opened the department store Selfridge & Co. in London,…