A brief synopsis of the episode, courtesy of NBC, follows. Be forewarned, there are spoilers in the description. "Karen (Katharine McPhee) finds herself seduced by the glamorous life of new BFF Rebecca Duvall (special guest star Uma Thurman) -- but can Rebecca be trusted?" ask press notes. "What will Karen's ascent mean to her relationship with Dev (Raza Jaffrey)? And will Rebecca drive Derek (Jack Davenport) insane? Eileen (Anjelica Huston) introduces new beau Nick (guest star Thorsten Kaye) to ex-husband Jerry (guest star Michael Cristofer), while Julia (Debra Messing) panics when her son Leo (Emory Cohen) goes missing." Megan Hilty and Christian Borle also star.

As previously reported, the April 16 episode is titled " The Movie Star" and is described as such: "Bombshell is turned upside-down by the arrival of movie star Rebecca Duvall (special guest star Uma Thurman). Karen (Katharine McPhee) and Ivy (Megan Hilty) are drawn into an uneasy alliance against their new rival -- but can they overcome their history? The romance between Tom (Christian Borle) and Sam (Leslie Odom, Jr.) heats up, while Julia (Debra Messing) and Frank (Brian D'Arcy James) must put aside their differences to address a family crisis. Dev (Raza Jaffrey) faces a big decision." Anjelica Huston and Jack Davenport also star.

For more information visit www.nbc.com/smash.