This is the first time viewers saw Betty Anderson without her trademark ponytail. For a few episodes in season four , the character was allowed to have a more mature look, but according to actress Elinor Donahue, the producers decided it would be better for the character to have a ponytail, so she was given a clip on hair piece, which she was allowed to keep after the series ended.
Betty has short hair in this episode and for all the episodes following this one in season four and for all of season five. It isn't until the second episode "Bud Branches Out" in season six that Betty begins to wear her hair in a pony tail again with the clip on one given to actress Elinor Donahue by the producers.