The Daily Presents “Caliphate,” Chapter 8

The New York Times has introduced a documentary audio series that follows Rukmini Callimachi, who covers terrorism for The Times, on her quest to understand ISIS. Today, as a special episode of “The Daily,” we offer Chapter 8 of “Caliphate,” in which Rukmini finds a trove of secret documents that lead her to the mother of an ISIS official.

The next episode of “Caliphate” will publish in the series’s own feed next Thursday, June 14, and as a bonus installment of “The Daily” next Saturday, June 16. New York Times subscribers can listen to that episode now at nytimes.com/caliphate.

This episode includes disturbing language and scenes of graphic violence.