Babette ,Cindy and Jackie are outside discussing Babette's and Jackie's 'good old times' when Babette gets up to leave the table a boom mic is visible. Then the screen goes from Cindy and Jackie back to Babette with the boom mic once again visible for more than a few seconds jumping in and out of the screen.
In a dream sequence, Dylan presents Kelly with an emerald necklace. "That's Brenda Walsh's birthstone" she scolds him. But Brenda is a Scorpio, meaning that her birthday is in October or November, whereas emerald is the birthstone for the month of May.