Wikipedia
Wonder-ful
"Wonder-ful" is the twenty-first episode of the fourth season of the American musical television series Glee, and the eighty-seventh episode overall. It aired on Fox in the United States on May 2, 2013, and features the introduction of special guest star Katey Sagal as Nancy Abrams and the return of special guest star Kate Hudson as Cassandra July. The episode is a tribute to the music of Stevie Wonder.