First appearance of Laurie in The Circle.
When Leo tells Fez, "First of all, I think I'm Chinese", he's actually stating a fact. Tommy Chong's father was Chinese.
In this episode, Donna says Eric is a prude because of how he reacts to her show of public nudity. In previous episodes, he clearly had no problem with it, when Eric streaked at President Ford's rally and also when the gang went skinny-dipping.