The Fosters live in apartment #3B in this episode, but later live in apartment #2A.
If you listen carefully Bill Frawley (Fred Mertz) almost flubs his line when he talks to Ricky about Grace Foster falling in love with the Milkman!
Lucy: She didn't! (pause) She didn't! (pause) She didn't! (pause) She couldn't!
Ricky: Maybe that's why she didn't.
Ricky: How did it go with Ethel?
Fred: If she flapped her ears anymore she would have taken off and circled the room.
Ricky: Lucy, remember the saying; birds of a feather smell the same.
Lucy: You mean a rose by any other name flocks together.
Ricky: Lucy, why did you stop? Don't tell me you got tired taking Betty apart.
Lucy: Who got tired? Marge had to hang up. Betty just walked in.
Lucy: Hey! If they weren't asleep, they were awake!
Ethel: Well now, there's a monumental conclusion!
(Fred and Ricky are in the basement, talking through the furnace pipe)
Fred: Ethel Meeertz!
Ethel: Who's that?!
Fred: You ought to be ashamed of yourself.
Ethel: Who's that?
Fred: This is your conscience. You have been gossiping.
Lucy: Ethel, you have the loudest conscience I've ever heard.
Ricky: Lucy Ricaaardo! This is your conscience. You've been gosp-ing too!
Lucy: Oh, fine. My conscience has an accent!
My Favorite Husband: "Gossip"
Lucy refers to Ricky and Fred as Hedda and Lolly. Hedda Hopper and Louella "Lolly" Parsons were rival gossip columnists at the time. Hedda Hopper and Lucille Ball were very close friends in life with Hedda making a brief guest appearance in the season 4 episode "The Hedda Hopper Story".