Eep finds a mysterious pen pal to share her feelings with.

Squawk's students try to add some fun to his dreary life.

After finding their way out of a creature's stomach, the Croods head back to Ahhh! Valley to stop the Broods from taking over their homeland.

While Grug has his first day as leader of Ahhh! Valley, a new family pet makes Sandy jealous.

While giving a lesson on self-reliance, Grug suffers a mishap that tests his will to survive.

To help get all the valley's work done, Grug pairs up every adult with a child trainee.

When Munk reports his family missing, Grug takes it upon himself as valley leader to find them.

When the Big Chickuna invades the valley, all the residents evacuate to safety except for Bulk, whose rescue becomes a contest between Grug and Snoot.

While he and Eep are held captive by the Broods for a ransom, Thunk finds his soulmate.

Grug uses fear to get the residents to accept defense measures against the Broods.

A new liyote in the neighborhood targets Thunk for bullying.

Thunk demonstrates an unexpected talent that lands him a new job.

Eep realizes softy Thunk is the perfect partner for winning a cutthroat game.

Eep and Thunk try out a new lazy lifestyle.

When Gran reveals she's hidden a treasure guarded by booby traps, Eep sets off to find it.

A plan to get revenge against the Broods backfires.

When the Broods steal the valley's food supply, it's up to Eep and Lerk to get it back.

Ugga joins the "nitting" club, but has trouble fitting in.

The residents of Ahhh! Valley celebrate Howl Day.

Ugga's popular meatzza business attracts a competitor: Amber.

Grug invents a sport he hopes will earn him a spot on the Wall of Fame.

A sticky situation forces Grug to accept Gran as his hunting partner.

While laid up with an injury, Eep witnesses a suspicious encounter.

When Grug is imprisoned for a crime he didn't commit, he must escape to clear his name.