With school starting, Anne, Nick and Shania test a rocket messenger system so that they can stay in touch during the school day. They quickly realize that they need something smarter than a rocket to be able to carry messages. Using supplies around the junkyard, the kids turn an ordinary pigeon into a bionic flying delivery system.

It's the first day of school and Nick is nervous about making new friends. Luckily he meets a girl named Charlie who shares his love of science. Meanwhile, Pidgely is on his first "Harrier Pigeon" mission to deliver a message to Nick and Shania, but when he misses the designated time to meet up with them, he has to get resourceful.

Anne, Nick and Shania are babysitting Shania's little brothers when Pal discovers that Meow Cat has had kittens. Shania's super excited and takes one of the kittens away, but quickly learns this was a bad idea. When she tries to return the kitten, Meow Cat has moved and taken the other kittens with her. The kids have to find Meow Cat and return the kitten to its Momma before it's too late.

When Nick's Dad bails on a Father/Son Science Center Challenge at the last minute, Anne lets Nick borrow her Dad. While Nick and Anne's Dad do some male bonding as they try to figure out how to make the fastest mini-vehicle without wheels, Anne, Shania and Nick's Mom do some female bonding with a girls' day.

Anne gets an assignment from school that instructs her to "get closer to one of her dreams." She's not sure what it means, but Nick and Shania help her figure out that one of her dreams is to make contact with alien life. To help Anne get closer to that dream, they experiment with how to send one of the androids into space.

Nick's friend Zack builds a basketball-playing robot and enlists Anne's help to make it work. When Nick finds Zack and Anne working together at the junkyard, Nick is jealous and challenges the robot to a game of one-on-one.

After Shania brings her dog Cyrus to the junkyard for a DNA experiment, the dog gets lost, so the gang uses forensic investigative techniques to find him in the neighborhood.

Anne is planning a series of experiments with dry ice, but her plans are interrupted by an invitation to Charlie's birthday party. At the costume party, Anne is excited to find dry ice so she can finish her project. Meanwhile, Nick and Shania have to keep Charlie from finding out about Pal when Pal decides to tag along.

When Hand gets broken using a pulley system, Anne asks the others to look for a replacement part. While searching, Shania and Nick fall into a hatch. In order to get her friends out, Anne has to fix what was wrong with her pulley system in the first place.

The kids decide to make a sci-fi movie, but after Shania gets a bad mark on a project about volcanoes, Grandma threatens to ground her from the junkyard for a whole month. Anne and Nick discover a way to help Shania fix her grades and make a movie about it along the way.

A woman named Ada comes to the junkyard to buy something from Anne's Dad, and the two discover they share a passion for robots. Ada invites Anne to visit the lab where she works, and shows her a big world outside the junkyard.

When Nick's Dad cancels a winter getaway up North, Nick is upset. Anne and Shania try to make it up to Nick by building a machine that demonstrates the phases of matter to make snow and ice -- so that the kids and androids can have a winter celebration at the junkyard.