A taste of home sends Sam on a mission to find his mom, with Guy and E.B. in tow. But a plot twist takes their story in a wildly different direction.

The friends hear the histories of Yookia and Zookia. Sam's desperate to connect with Pam, but a suspicious Guy doesn't trust her.

Sam shadows Pam on a super-secret spy mission, even though she'd rather work alone. In tech-loving Zookia, Guy finds an inventor's paradise.

Pam and Sam team up for an undercover job. A scampering squail leads E.B. to the top of the border wall, where she makes a mysterious new friend.

E.B. runs away to spend the day with Looka. Everything's perfect - until a hidden relic reveals the truth about the history of the wall.

Sam and his mom track the Moo-Lacka-Moo to a tropical island crawling with surprises. Guy gets Michellee's message and can't believe his eyes.

A well-meaning Guy saves E.B. from danger and shares his doubts about Pam with Sam - but it only seems to push them both further away from him.

So who gets the Moo-Lacka-Moo? With the fate of Yookia and Zookia hanging in the balance, the friends must decide where their loyalties lie.

Butter side up, butter side down: The great butter battle is brewing! Can our heroes work together to stop it in time?