Okay- I had to cheat. I checked my vhs recording. It's not during the party invite routine, it's before it. Lou, carrying a huge bundle of packages, rings Fields' doorbell. Sid then mistakes Costello for his wife, saying "You've been shopping!" the name he says, of course is...

Totie!


Just kidding of course. it's Sally.

Or is it Marie...

What was the name of the girl (ROBOT MONSTER's Claudia Barrett) Costello chose as Miss MudTurtle in "The Beauty Contest Story?

P.S: IMDB for some reason does not include her appearance in this episode, but does for another, "Wife Wanted" so no help from that quarter.

"How can I handcuff a bloomin' shirt??!?"