Yet another easter egg can be found on disc 5, using the same technique as we used to find disc 4's feature. To refresh your memory, go to "Bonus", "Lucy on the Radio" and scroll right until Lucy's microphone lights up. What you see is again another rare photo of Lucy with her co-star, Richard Denning. The episode itself is interesting, as it's clearly one of the first ones, as the announcer stressed it's "new" at the beginning of the story, and due to the fact (and the DVD notes this), that here the Cooper last name is not in use, that came later on in the show as it grew more popular I presume, but anyway with time, the name changed. Here they're called the Cugats.
Reviews: DVD Talk also has a review of
I Love Lucy Season Four by John Sinnott.