Hazel reveals that she is a licensed vocational nurse (LVN),having gone to night school.
This episode introduces Howard Smith who portrays Harvey Griffin, one of Mr. Baxter's most important legal clients who appears in many subsequent episodes. You hear Mr. B refer to Mr. Griffin as "the steamroller" for the first time as well.
This is one of the few episodes where you actually see the parakeet in the kitchen move in its cage when Hazel walks by. In most of the subsequent episodes, the cage is either empty or the bird appears to be a fake and doesn't move at all regardless of the activity around it.