When Lucie began filming a pilot for her own series, Vivian Vance was considered to become a regular the following season to fill the void. Unfortunately, Lucie's pilot didn't sell, and Vivian was diagnosed with breast cancer and could no longer take on anymore weekly assignments.
The Lucy and Uncle Harry scene at the end is very heartwarming. Gale Gordon is essential, and should be credited for the on-going popularity of this show.
Vivian Vance was 63 years old when this episode was filmed. This is also the last time Viv will appear on one of Lucy's weekly T.V shows.