The first episode that Cindy didn't wear her ponytails was in the episode "Cindy Brady Lady."
When Marcia shows Cindy the poster she made and says that she's gonna drive Jan around the neighborhood and pass out the cookies that Alice made, how can she do that when she doesn't get her licence until two episodes after this one in The Driver's Seat.
This is the first episode to air that Cindy don't wear her pig tails. The first episode filmed without them was "The Driver's Seat."
Jan: Do you think this dress is ok for my senior night?
Maria: Well, it all depends on what CREEPS are wearing this season.
Jan: I'm not a creep.
Peter: I agree with Jan, she's not a creep.
Jan: Thank you.
Peter: (to Jan)You're a SUPER creep!
(Carol appears in a cowgirl outfit)
Mike: Whoa-ho-ho! You can ride on my range any time!
Mike: (to Jan) A Brady never goes back on his promise ...
This is the first episode that shows Cindy with braces. She makes note of it when she jokingly suggest that Jan take her turn at the dentist.