I got original scripts from Etsy.com. I think all of them have little things in the dialogue that got changed when they made the show. There is a lot of them. There were a bunch of changes made as far as the episode “Lucy Does A TV Commercial” goes. Here are the script samples in which major changes were made. You will notice that in the original script Fred (not Ethel) is the only Mertz that appears.

Here are some more:

There were a bunch of changes I think that were made as far as the episode “LA At Last” goes. Here are the script samples in which major changes were made.

Here is some more: