Smash 2×05 “The Read-Through” airs March 5, but NBC is teasing Sean Hayes and Nikki Blonsky’s guest-starring roles in 15 new pictures.

Take a look at the photos below to see Tom (Christian Borle) on stage, Eileen visiting Nick in jail, more of Katharine McPhee as Marilyn, Sean Hayes interacting with Megan Hilty and Nikki Blonsky looking excited.

[scrollGallery id=1201 autoScroll=false usecaptions=true height=600 width=600 thumbsdown=true]

Julia’s (Debra Messing) fears increase when Tom (Christian Borle) airs his suspicions of Peter (guest star Daniel Sunjata). Jimmy (Jeremy Jordan) and Kyle (Andy Mientus) confront their own crisis of confidence as “Hit List” is read for the first time. Meanwhile, Ivy (Megan Hilty) realizes her triumph might not be all she hoped when she meets her new co-star, Terry Falls (guest star Sean Hayes), and Karen (Katharine McPhee) wonders if she can trust Jimmy. Anjelica Huston, Jack Davenport and Krysta Rodriguez also star. Sean Hayes, Daniel Sunjata and Nikki Blonsky guest star.

Smash airs Tuesdays at 10 p.m. EST on NBC. Tune in for 2×04 “The Song,” guest starring Sheryl Lee Ralph (Dreamgirls, Moesha) this Tuesday, Feb. 26.

Listen to the latest episode of Smash Chat for news and discussion of the NBC musical drama.