In The Original Fry Cook, SpongeBob says to Squidward he's not working at the Krusty Krab for the money. The climax reveals this was why Jim quit his job.
It was revealed Squidward once had long blonde hair.
Night Light is the first appearance of Mermaid Man and Barnacle Boy without their names in the title.
Normally SpongeBob sleeps in his underwear and shoes; Night Light is the first time he wears green pajamas and a matching nightcap. Patrick also gets his own pajamas as well.