SIMMERING TENSIONS RESURFACE WHEN JANET -- SAVI AND JOSS' FREE-SPIRITED, OPEN-MINDED AND OFTEN ABSENT MOTHER - COMES FOR AN UNEXPECTED VISIT, ON ABC'S "MISTRESSES"

Jo Beth Williams Guest Stars as "Janet"

"Guess Who's Coming to Dinner" -- When Savi and Joss's free-spirited, open-minded and often absent mother, Janet (guest star Jo Beth Williams), comes for an unexpected visit, she brings big news but also stirs up some long-simmering family tensions. Now that Karen realizes that Elizabeth Grey (guest star Penelope Ann Miller) knew all along about her affair with Tom, she wonders if Elizabeth might have actually killed Tom because of her; and April questions whether she should tell her daughter she's dating Richard (guest star Cameron Bender), although she has yet to tell Richard about the return of her supposedly-dead husband, on "Mistresses," MONDAY, JULY 29 (10:01-11:00 p.m., ET) on the ABC Television Network.

"Mistresses" stars Alyssa Milano as Savannah ("Savi") Davis, Yunjin Kim as Karen Kim, Rochelle Aytes as April Malloy, Jes Macallan as Josslyn Carver, Brett Tucker as Harry Davis, Jason George as Dominic Taylor and Erik Stocklin as Sam Grey.

Guest starring are Jo Beth Williams as Janet, Cameron Bender as Richard, Dondre T. Whitfield as Paul Malloy, Penelope Ann Miller as Elizabeth Grey, Joseph Lyle Taylor as George Dingess, Corinne Massiah as Lucy, Madison Moellers as Madi, Rich Cooper as Todd, Andres Londono as Diego, Sonya Ashikyan as young Joss, Cheyanne Cope as young Savi and Roddy Jessup as young man.

"Guess Who's Coming to Dinner" was written by David Folwell and directed by Tawnia McKiernan.

"Mistresses" is broadcast in 720 Progressive (720P), ABC's selected HDTV format with 5.1 channel surround sound. A TV parental guideline will be assigned closer to the airdate.