This episode introduces 3 regulars who appear in all five seasons: Maudie Prickett as Rosie (another maid and Hazel's best friend), Robert B. Williams as Barney the mailman, and Queenie Leonard as Mert, another maid and good friend of Hazel's. Queenie also appeared as two other characters in other episodes: Marybelle and Peggy. "Dorothy's Birthday" was the original pilot but was shown much later in Season One and Robert B. Williams as Barney the mailman was technically introduced in that episode.