A brief synopsis of the episode, courtesy of NBC, follows. Be forewarned, there are spoilers in the description.
"The show has landed a star, the mercurial Rebecca Duvall (guest star Uma Thurman), but Eileen (Anjelica Huston) is thrown into a panic when Rebecca gets stuck in Cuba," according to press notes. "Derek (Jack Davenport) puts Karen (Katharine McPhee) in as understudy, but she must learn to perform under extreme pressure as he threatens to break her will. Tom and Julia (Christian Borle and Debra Messing) celebrate their anniversary with a ritual – and face some hard truths about what show business can do to relationships." Megan Hilty, Raza Jaffrey and Jaime Cepero also star. Uma Thurman guest stars.
For more information visit www.nbc.com/smash.