“Came In From the Cold” may be Le Carré’s best, but I think “Looking Glass” is my favorite. That’s true of the book, but Ian McDiarmid as an incompetent agency director is also a lot of fun. Le Carré has a particular kind of plot that boils down to “stupid people making stupid decisions,” and I think this is the best of them. It’s a damning story of toxic World War II nostalgia, desperation to be doing something meaningful with one’s life, and manipulation by more competent cynics.

In some ways this is the least interesting of the Smiley stories. There’s something fun about a retired Smiley doing detective work, and it’s fascinating to get glimpses at the British class system, but it’s not Smiley in his element (as it will later become), and it feels like a distraction in that sense. Yet, the radio adaptation is so, so nicely done that I can’t help but give it full marks.