While exploring the Great Barrier Reef to determine if coral is a plant or an animal, the trio learn that looks can be deceiving.

With David sick in bed, Jane must partner with an unexpected ally to save Greybeard from a pride of lions.

The three friends use their underground vessel to observe the elusive pink fairy armadillo, but a garden problem stops them in their tracks.

Jane, David, and Greybeard set off to find out why hippos give birth away from their pods, while trying to reunite a baby hippo with her mom.

Chasing a herd of caribou stirs up David's appetite. At lunch, David's grandpa tells a story about respect, responsibility, and sharing.

Tracking a wolf in the snowy mountains leads the trio to their neighbor's pug, who helps connect the dots between wolves, dogs, and people.

Jane and David stay up past their bedtime to track a tiger that prefers to come out at night, and they stumble upon something in the garden shed.

Jane, David, and Greybeard track a polar bear in the Arctic Circle, inspiring Jane to convince her neighbor Mr. Jin to see trash differently.

David shrinks Jane and Greybeard to honeybee size to explore a hive. But when a schoolmate threatens the bees, Jane swoops in.

The trio take off on a mission to aid the flying fox when Greybeard accidentally parachutes into a neighbor's yard.

While trying to tag a great white shark, Jane urges David's dad and Tata to rethink how they shop for groceries.

Jane, David, and Greybeard must reunite a lost baby panda with its mother—and find out why they're the only bears with six fingers.

The three friends travel deep into the ocean to figure out why the blue whale sings, and Jane confronts a litterbug with a gifted voice.

Jane, David, and Greybeard try to sniff out why the gharial has a bulbed snout. A day at the pool points Jane toward an answer.

Jane, David, and Greybeard monitor a black rhino and a red-billed oxpecker, whose relationship teaches them the value of teamwork.

A bug-sized Jane and Greybeard follow a monarch butterfly's journey to Mexico, leading Jane to seek assistance from Mr. Patel's green thumb.

The trio head underground to dig into wombat defense tactics. Jane wants the community BBQ menu to explore new options.

David joins Jane on a high-flying mission to chart an albatross' journey instead of helping his sister Millie.

Jane convinces her reluctant abuela to help get a baby elephant back to his family, where she uncovers why herds follow a matriarch.

Jane and Greybeard lose hope when they see how humans impact chimpanzees in the wild, but David and a special friend restore her faith.