This week’s show is all about crime: author Sue Grafton had never tried to write a mystery before “A Is for Alibi,” the first novel in her Kinsey Millhone series. Now that she’s on “X,” she’s getting ready for a well-deserved party. And we hear from Joshua Oppenheimer, director of the documentaries “The Act of Killing” and “The Look of Silence,” two films about a genocide whose perpetrators were surprisingly proud of their work. And one of the world’s most prolific art forgers can’t be prosecuted, because he never accepted a penny for his fakes.

(Segments in this week’s show aired previously.)