Photo Flash: Nick Jonas Returns for SMASH Season Finale, 5/14

In the season finale of NBC's SMASH entitled "Bombshell", the big night is finally here! 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. The season's final episode airs this Monday, May 14 at 10:00 pm/ET.

SMASH is a musical drama that celebrates the beauty and heartbreak of the Broadway theater as it follows a cross-section of dreamers and schemers who all have one common desire - to be a "smash." The series centers on the process of creating a Broadway musical based on the life ofMarilyn Monroe - written by the successful songwriting duo of Tom (Tony Award nominee Christian Borle, "Legally Blonde: The Musical") and Julia (Emmy Award winner Debra Messing, "Will & Grace"). Julia recently began the process of adopting a child with her husband Frank (Tony Award nominee Brian d'Arcy James, "Shrek The Musical") of many years, but her focus is torn when she has the opportunity to write another Broadway hit. A rivalry soon forms for the lead role between a youthful, inexperienced Midwestern beauty Karen (Katharine McPhee, "American Idol") - who is trying to find fame in the big city against all odds - and stage veteran Ivy Bell (Megan Hilty, "9 to 5: The Musical"), who's determined to leave the chorus line and finally get her big break. A tenacious producer Eileen (Oscar winner, Anjelica Huston, "Prizzi's Honor") discovers the "Marilyn" project and jumps on board with a brilliant director, Derek (Jack Davenport, "Pirates of the Caribbean" films) - whose talent is matched by his cunning and egocentric amorality. Jaime Cepero ("Porgy and Bess") stars as Ellis, and Raza Jaffrey ("Sex and the City 2," "MI-5") stars as Dev.

The series stemmed from an idea of executive producer and multiple Emmy and Oscar winner Steven Spielberg ("ER," "Schindler's List"). The pilot was written by acclaimed playwright/screenwriter Theresa Rebeck ("Mauritius," "NYPD Blue"). David Marshall Grant ("Brothers and Sisters"), Craig Zadan and Neil Meron (Oscar-winning "Chicago," "Hairspray") and Darryl Frank and Justin Falvey ("United States of Tara," "The Borgias") also serve as executive producers. Original songs are written by Tony and Grammy Award winners Marc Shaiman and Scott Wittman ("Hairspray," "Catch Me If You Can"), who serve as executive producers as well.

View photos from the upcoming episode below!

Photo credit: Will Hart, Patrick Randak/NBC