The works of John le Carré are among the most beloved spy thrillers of all time. So it was a perilous task that author Nick Harkaway, one of le Carré's sons, set out for himself. On this week's episode, Harkaway discusses how he picked up the torch from his father, who died in December 2020, to write a new tale starring George Smiley, the Cold War spy who has appeared in more than a half dozen novels.