In an upcoming episode, conservative commentator Linda Chavez and actor Adrian Grenier learn that they share long segments of identical DNA on their 13th chromosome.

WSJ: Henry Louis Gates Jr. on 'Finding Your Roots'

Starring Zach Grenier, Deirdre O'Connell and Noah Robbins, the hour-long play takes place one night at a bus stop outside a hospital in Kingston, N.

WSJ: Actor Hamish Linklater evolves into playwright

And Robert Grenier, a former head of the C.

NEWYORKER: The Black Sites

Robert Grenier, like many people in the C.

NEWYORKER: The Black Sites