It's a big week at Cogwheel Stadium-the baseball team the Clayton Cogs are playing for the pennant! The Aldens are helping out at the ballpark, and they're glad to be part of the excitement. But the other team's batters seem to know the pitches too well, and it's clear someone in the stadium is stealing the Cogs' pitcher's signals. Now the Boxcar children must find out who is spying for the other team!

When the Aldens join a soccer league, they are excited to take the field! But, with deflated soccer balls, ruined goalie gloves, and their star player trapped in the locker room during a game, it looks like there's been foul play. Can they solve this mystery and help their team have a good season?

A bad storm hits Greenfield and leaves behind a mystery! With no power or internet, the Boxcar Children will need to put the pieces together the old-fashioned way. It's been a while, since the children have powered down. Can they figure out what's going on, while being unplugged?

A new restaurant is opening up in Greenfield, and the Aldens are first in line to help the owner start up a food pantry. They do everything they can to collect donations, from putting up signs to offering a free Thanksgiving dinner for the whole town, but someone keeps moving the signs and even steals the giant turkey that was meant for the dinner. The clock is ticking to get it back, but never fear, the Boxcar Children are on the case.

The Aldens are visiting a real dinosaur dig in Montana, in an area full of fossils and caves! But the bones of a rare dinosaur have gone missing, and when the children begin to search for clues they hear strange noises in the caves and discover mysterious tracks! Why are bones disappearing? And could there be a real-life dinosaur on the loose?

The Aldens are visiting friends for a big Dia de los Muertos celebration. The kids love learning about the holiday and helping out, that is until mysterious events threaten to ruin everyone's preparations. Can the Aldens figure out what's going on and help their friends save the celebration?

The Aldens are helping Grandfather prepare for Greenfield's Winter Festival by cleaning a statue of a Revolutionary War hero in the town square. When Violet finds a mysterious message in a photograph of the statue, the Boxcar Children have to find out what it means for the statue and the festival.