When the car drives down East 68th Street, the viewers get to see the front of the Mertzes apartment building for the very first time.
When Ethel is sad about the Ricardos leaving, Lucy reassures her that they will only be gone a month. Ethel says that she knows they will end up staying in California longer. In real time, the trip actually lasts 11 months.
The Ricardo's telephone number changes once again to MUrray Hill 5-9099. It will remain their number for the rest of the time they reside in the Mertz's apartment building.
Lucy looks at redacted time tables for the Union Pacific Railway and Greyhound Bus Lines.