A brief synopsis of the episode, courtesy of NBC, follows. Be forewarned, there are spoilers in the description.
First Look at "Smash" Episode "Bombshell," With Nick Jonas and Michael Riedel
"The big night is finally here," according to press notes. "Tom (Christian Borle) and Julia (Debra Messing) race against time to save the show, while Derek (Jack Davenport) makes a decision that will change the lives of Karen (Katharine McPhee) and Ivy (Megan Hilty) forever. Ellis (Jaime Cepero) reveals his true colors. But when he finally makes his move to save Bombshell, will it be for or against Eileen (Anjelica Huston)? In the midst of it all, another bombshell goes off – this one is in Karen and Dev’s (Raza Jaffrey) relationship."
For more information visit www.nbc.com/smash.