When their animal friends need help, brother-and-sister team Toby and Teri use the clues and follow the facts to solve mysteries in their own backyard.
A swarm of honeybees won't leave poor Bean alone -- and he doesn't know why! / Millie's measuring cup goes missing at the beach.
After Rumy, Jay and Bean build a sandcastle, they wake up to find it in ruins. / A hurt bird seems like she wants the friends to follow her.
Something swoops in out of nowhere and starts snatching the gang's most prized possessions. / Rumy wants to fly but can't seem to get off the ground.
Bean and Rumy look for a lost ball in the woods, but a squeak scares them away. / The friends are on the case when the water in the spring turns purple.
Rumy makes friends with a talking rock named Rocco! But rocks can't talk ... or can they? / Toby and Teri learn where rainbows really come from.
Teri and Toby throw a party for a famous explorer but can't find the guest of honor. / The gang works together to get a lost egg back to its mother.
There's a curious case to solve when the log bridge to Mud Island disappears. / Toby and Teri use their friends' "superpowers" to find a missing Bean.
The gang goes ghost-hunting after Millie snaps a picture of a floating white shape. / Jay helps deliver the mail but learns he's afraid to fly at night.
The friends have to find more thimbleberries after Rumy eats them all. / Millie visits Butterfly Grove -- but the butterflies are nowhere to be found!
Teri and Toby help Rumy find a lizard who seems to have vanished into thin air. / Rumy must retrace his steps when he loses an important key.
Someone -- or something -- is stealing water in Acorn Springs. / A mystery singer in the woods matches Millie's voice in perfect harmony.
It's the middle of summer, so why are snowflakes falling from the sky? / Toby and Teri help Rumy make music so he can play in Millie's band.
Bean digs up his secret stash of acorns -- only to find they've gone missing. / Magic makes Millie's stick pile disappear!
The friends help a shy little hedgehog face her fears and find her parents. / Rumy's convinced he saw a monster at Pistachio Pond.
A prank-loving raven has a lot to learn about making new friends. / Bean worries his favorite tree is sick when it starts losing its leaves.
Animals have been telling "Big Fin" stories for years, but no one's actually found her. / Teri and Toby try to help Bean catch a shooting star.
Bean wonders how a "flying" fish gets up in the air. / Even though it's a cold winter day, Millie's snow statue is still melting too fast.
A homemade sled doesn't work as well as Bean hoped it would. / An ermine's fur changes from brown to white -- but why?
Toby and Teri help a kind but klutzy crane befriend a group of other birds. / Millie made cupcakes for Bean's birthday, but now she can't find them!
The Festival of Friends is finally here -- but all of the gifts are gone! / Teri and Toby make up a mystery for their pals to solve on New Year's Eve.
Complete episode guide for Treehouse Detectives with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in Japan.
This episode guide is organized by seasons, making it easy to track your viewing progress or find specific episodes. Use the episode information to plan your binge-watching sessions or catch up on missed episodes.