In "Palmdale, Ech", Jean McElroy is visiting and both Alan and Lyndsey are showing her around Los Angeles. Jean, played by Georgia Engel, acts sweetly, but voices considerable disappointment in the deplorable actions and behavior of her daughter and grandson in a similar manner to Alan's own mother, Evelyn. So they experiment this by introducing Evelyn to her mother. At first, the mothers don't like each other, but they bond and go out after Alan and Lyndsey head home from dinner. In the morning, Alan and Lyndsey are shocked to find their mothers sleeping together.