When Lucy and Ethel the "Martian Women" are in costume scaling the outside railing of the Empire State Building, the first shot of them shows they both have ray guns tucked in to their belts. When the shot pans back to them climbing down, only Lucy has her gun and the two of them hand it off to each other whenever they use it. But when the full shot is shown of the observation platform, you can see the other gun lying off in the background where Ethel dropped it!
Ricky: Money always marries money.
Lucy: Yeah. Why doesn't money ever marry broke?
Lucy: I'm never going to be envious of anyone again.
Lucy: So what if I'm not sitting in the lap of luxury? I'm happy where I am, on the bony knees of nothing.
Ricky: Honey, the only way to be real happy is to be satisfied with what you got.
Lucy: Oh? What have I got?
Lucy: (sarcastically) My cup runneth over!
Ricky: How much did she bid you for?
Lucy: Five measly dollars. I'm taking her a check.
Ricky: Why don't you mail it to her?
Lucy: Oh, because I want to see her penthouse. I bet it's just fabulous.
Ricky: There you go again! Wanting something that you haven't got!
Lucy: I do not! I just wanna see what it is that I haven't got that I don't want!
Cynthia: Parlez francais?
Cynthia: Parlez-vous francais?
Lucy: How's that again?
Cynthia: Do you speak French?
Lucy: Oh yes! Fluently!
Ricky: Lucy, why do you envy those people?
Lucy: I don't envy them. I just wish I could dress like them and live the way they do, that's all.
Lucy: Not even for sweet charity am I gonna box three rounds with a kangaroo!
Lucy: (posing as a woman from Mars) It's a Moo Moo!
At the very end of the episode when Lucy and Ethel constantly hit Ricky and Fred with napkins, Lucy accidentally drops hers before wailing on Ricky.
Mary Jane Croft makes her debut appearance with Lucy in this episode. She appeared with Lucy many times over the years in I Love Lucy and Lucy's later TV shows.
This was writer/producer Jess Oppenheimer's least favorite "Lucy" episode.