While Cathy is considered the front runner for student of the year, Patty, acting on the advice of her father, decides to take on more responsibilities at school. Her actions increase her chances at becoming student of the year.
Cathy is chosen to show Sal Mineo around his old Brooklyn Heights High School, but Patty thinks the honor should go to her. Cathy relents and Patty gets a chance to act with Sal Mineo in a school play.
Patty falls head-over-heels for her new science teacher, Greg Noble (Robert Goulet) - and her studying genetics of 19th century scientist Gregor Mendel only serves to convince her that their genes are a perfect match, and being Mrs. Greg Noble is her destiny.
Ross' pet frog accidentally finds its way into Patty's bed. This triggers a series of practical jokes that eventually involves the entire family, whether they deserve the practical joke treatment or not.
Martin begins to feel he is losing touch with his daughter Patty and would like to spend more time with her. When Patty agrees Martin begins to realize that he may be getting more than he bargained for.
Cathy writes a letter critical of an editorial in her Uncle Martin's newspaper, not knowing that her uncle wrote the editorial. The resulting firestorm has Cathy worried about her future in the Lane household.
Patty, because of her lack of cooking skills, fears that she is losing Richard to a rival. So Patty enlists Cathy to cook for her in order to get Richard back. But the plan backfires when Cathy is called away before she can prepare the meal.