Air date: 2017-03-17

Runtime: 33 min

When a burst pipe dashes Julie's plans for "The Wizard of Oz," Idina Menzel gives the Greenies a pep talk and inspires a wickedly good alternative.

Air date: 2017-03-17

Runtime: 27 min

The Greenies start working on the script for their mashup musical with help from Chris Colfer, who teaches them that words are important.

Air date: 2017-03-17

Runtime: 27 min

Josh Groban visits the theater for Julie's birthday and shows the Greenies how to sing from the heart -- and in perfect harmony.

Air date: 2017-03-17

Runtime: 27 min

When a disappointed Peri learns she'll be playing an ogre, Alec Baldwin reminds the Greenies that acting is all about pretending.

Air date: 2017-03-17

Runtime: 27 min

The Greenies hit the barre for a master class with married dancers Tiler Peck and Robert Fairchild, who've come to show them some ballet basics.

Air date: 2017-03-17

Runtime: 27 min

Sara Bareilles stops by to teach the Greenies how to make their own melodies. But combining music and lyrics takes serious teamwork.

Air date: 2017-03-17

Runtime: 27 min

The Greenies attempt a run-through, but their focus is on the fritz. Can improv expert Ellie Kemper shape their chaos into something amazing?

Air date: 2017-03-17

Runtime: 27 min

When Fizz asks master violinist Joshua Bell for musical guidance, the friends learn that playing an instrument takes tons of practice.

Air date: 2017-03-17

Runtime: 27 min

Julie sends in a clown -- professional showman Bill Irwin -- to help calm Riley's fears about being funny and teach the gang about circus arts.

Air date: 2017-03-17

Runtime: 27 min

When the percussion instruments they ordered go missing, the Greenies are forced to improvise with a little help from the cast of “Stomp.”

Air date: 2017-03-17

Runtime: 27 min

Special guest Tituss Burgess shows up with an array of colorful costumes that help the Greenies bring their characters to life.

Air date: 2017-03-17

Runtime: 27 min

The Greenies' first dress rehearsal is a mess rehearsal. Can guest director David Hyde Pierce help them sort things out before curtain call?

Air date: 2017-03-17

Runtime: 34 min

It's opening night, and the Greenies are ready to share what they've learned with a live audience -- including VIP patron Mrs. Edna Brightful!