Here are pictures and episode details for the season finale of Smash “Bombshell” which will air on Monday, May 14, 2012 at 10PM ET on NBC.

These Smash pictures feature Katharine McPhee, Megan Hilty, Nick Jonas and Jack Davenport.

Smash Bombshell Synopsis: 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. (Smash Episode Guide)

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SMASH — “Bombshell” Episode 115 — Pictured: Nick Jonas as Lyle West — (Photo by: Will Hart/NBC)

SMASH — “Bombshell” Episode 115 — Pictured: (l-r) Megan Hilty as Ivy Lynn, Katharine McPhee as Karen Cartwright — (Photo by: Will Hart/NBC)

SMASH — “Bombshell” Episode 115 — Pictured: Is it Karen or Ivy who lands the role of Marilyn in the season finale of SMASH? — (Photo by: Eric Liebowitz/NBC)

SMASH — “Bombshell” Episode 115 — Pictured: (l-r) Jack Davenport as Derek Wills, Megan Hilty as Ivy Lynn — (Photo by: Will Hart/NBC)

Photos: Will Hart/NBC, Patrick Randack/NBC, Eric Liebowitz/NBC © NBCUniversal, Inc.