WHO DO YOU THINK YOU ARE? -- "Vanessa Williams" -- Pictured: Vanessa Williams -- Photo by: Chris Berkey/NBC

It has been a lot easier this season for Lisa Kudrow to get celebrity participants on her ancestry series Who Do You Think You Are (Fridays, 8:00 p.m. ET/PT, NBC).

The actress/producer was so detailed in her exploration of the celeb backgrounds (without exploitation) that when they began production on a second season, the stars aligned.

Tonight, we’ll learn about the family history of actress/singer Vanessa Williams and - as Kudrow explains in the video below - tracing the roots of people of color has its own specific challenges.