The last name of Madame Lemond comes from Bob Lemond, the announcer on My Favorite Husband.
Lucy: I'm going to get in that show, or my name isn't Lucy Ricardo.
Ricky: What did you say, Clem?
Ricky: By the way, what was the terrible accident on the streetcar?
Fred: (laughing) Wouldn't you like to know!
Fred: Well, I'll tell you anyway. But remember, this is my best gag and you gotta promise not to use it.
Ricky: OK, I promise. What was the terrible accident on the streetcar, Fred?
Fred: Well, a man had his eye on a seat and a woman sat on it. (Ricky looks away in disdain while Fred laughs) What a pipperoo! Remember now, you promised not to use it.
Ricky: That's one promise I will never break.
Burlesque Comic: (to Lucy) Say, you're a nice looking fella.
Madame Lemond: I think we should go to the barre.
Lucy: Oh good, cause I'm awful thirsty.
Lucy: I'm going to get in that show if it's the last thing I do.
Ethel: Lucy, you're too young to die.
Lucy: Here I am with all this talent bottled up inside of me, and you're always sitting on the cork.
Lucy: (after her ballet dance) Well?
Ricky: (to Lucy) Well, you'll do for the comic, but who am I gonna get for the ballet dancer?
Ricky: (speaking about Lucy) What am I going to do about her?
Fred: Have you ever thought of putting her in a large basket and leaving her on somebody's doorstep?
Ricky: That wouldn't work. She's too smart. She'd find her way home.
Lucy: I was in a dance recital in high school, The Dance of The Flowers.
Fred: She has got nice stems.
Lucy: Thank you. I was the only petunia that did a solo.
Lucy: Even with the barre?
Madame Lamond: Even with the barre!
Despite rumors to the contrary, the scene where Lucy gets her foot stuck in the barre is in the original script for the episode. The script is included on the DVD.
When Lucy gets hit with the pie you can hear Desi Arnaz laughing back-stage.