How do countries decide who's in charge? E.B. goes to a medieval reenactment camp to see first-hand how medieval kings seized power and ruled with absolute authority.
From the label "#1," the gang realizes they're looking for the best of something. But what? Turns out, they're looking for the best bread.
Kyla follows the postcard clue to the Salem Chapel BME Church, which was part of the Underground Railroad, helping American slaves escape to freedom in Canada.
What do dried fish, fur, and an old ax head have in common? To find out, E.B. helps cut down a tree ("TIMBER!") and makes a traditional cod recipe, while Kyla visits a fur trade museum.
The gang discovers that when it comes to games, what's old is what's new. E.B. gets transformed into a 3D character at a motion capture studio.
The gang is perplexed to learn that a building that used to be on the shore is now inland. How could that happen? Kyla goes to check out the building's archives.
Who (or what) was "R---r?" The file label is too smudged to read. E.B. meets a Voyageur re-enactor and canoes downriver to a Native settlement, while Kyla makes flour at an historical, river-powered mill.
Today's mystery is a whodunit! To find out what killed a mummy, Kyla goes to the archaeological museum to examine a real mummy, while E.B. takes the tooth to a dental school to do forensics.
E.B. wonders if the mystery could be about outer-space aliens (the lamprey sure looks like one!).
Why do we wear masks at Halloween time? To find out more about autumn celebrations, E.B. goes to a Celtic bonfire ceremony, and then gets traditional Mexican Day of the Dead make-up.
What's the difference between working animals and pets? Kyla sends a message by carrier pigeon and visits a re-created 19thcentury village where horses pull carriages and plow fields.
It's Tilly's birthday, but the kids pretend they've forgotten because they're planning a surprise party. Tilly won't stop dropping hints, she even chooses a mystery about gifts.
Kyla repairs the ring with a jeweler, and discovers it's a wedding ring - a symbol of a contract. Meanwhile E.B. takes the wampum belt to a Native expert, and learns that it was also a kind of contract.