Fancy Nancy's little sister JoJo helps their mother and father with the new twins.

Bradley, Brian, Nate, and Lucy try to help out the Flying Fortunatos, an acrobatic troupe with a very shabby traveling circus, by identifying the marvelous, hooded trapeze artist they spied rehearsing.

As a Father's Day gift to the twins' Dad, Bradley, Brian, and their cousins Lucy and Nate try to identify and stop whatever creature is biting fruits and vegetables in the garden.

Seven-year-olds Bradley, Brian, Nate, and Lucy make observations and gather clues that convince them that their older siblings, cousin, and animals have been captured by hungry space aliens.

Bradley, Brian, Nate, and Lucy visit a haunted hotel on Halloween, but once inside they realize that they have seen plenty of people going in and none coming back out.

Bradley and Brian need help from Nate and Lucy after a hypnotist turns their mother into a duck but does not quite get her changed back.

On their first day of school, Lottie and Mia meet a girl named Anna. She has a very loose tooth. During the school day, Anna loses her tooth. Lottie and Mia use their special Super Twin powers to help find it.

When his twin sisters get into an argument while visiting another planet, Zack needs to save Cathy and Charlotte's sisterly bond from intergalactic destruction.

A pair of different-as-can-be twin brothers accidentally bring their favorite video game to life, and must now find a way to work together to defeat it.