Widowed professor Kevin Burke tries to find a nanny for his twin girls, who want someone to discuss "girl stuff", like their dad's student Carrie.

The twins get a tutor while Kevin regrets taking advice from Carrie.

Ashley's boyfriend invites Mary-Kate to his house for a visit and Carrie dates a know-it-all.

The twins plot to sabotage Kevin's romance with a woman he's dating so they don't lose Carrie.

The twins switch costumes with Max and Brian to attend Carrie's Halloween party disobeying their father's orders.

Ashley discovers the guy she likes already has a girlfriend and Mary-Kate's pet pigeon flies away.

Mary-Kate feels abandoned when Ashley makes a new friend while Carrie pressures Kevin to resolve his issues with Eddie.

Kevin doesn't feel so merry when Carrie takes over Christmas preparations, but a miracle on Christmas Eve makes his spirits bright.

Mary-Kate falls for a guy who loves swing dancing while Ashley gets a job for which she has no skills.

Carrie dates Kevin's doctor only to learn something disturbing and Mary-Kate hides in the attic to get away from Ashley.

Carrie tells an old boyfriend she's engaged to Kevin while the twins throw a party that's livened up by a band.

Kevin causes trouble when he offers a man's perspective to Carrie's lovelorn friend while Ashley falls for a sports fan.

Carrie considers moving in with Kevin while Mary-Kate thinks about losing a karate match to her cool opponent.

Kevin dates Carrie's best friend and Ashley puts the school's money at stake on a dare.

Kevin draws the line when Carrie dates Matt while the twins are paired with polar opposites for a school project on marriage.

Kevin is unable to break up with Nancy and Ashley uses her father's credit card to buy a new purse.

The twins scheme to bring Kevin and Carrie together in a romantic setting where anything can happen.

Kevin gets in trouble for playing hooky when he's caught on the giant video screen at a Cubs game while Ashley pranks Mary-Kate's weird new friend to impress the captain of the pep squad.