When two things go missing in the middle of the night, Eep hunts for clues to solve the first mystery ever.

Because he is so stinky, Thunk pretends to be something that he really isn't.

An animal bite has a freaky effect on Grug.

Grug won't let Eep join his winning team, so she forms her own group to play in history's first sports event.

After the Croods taste a new food for the first time, they can't stop eating it.

Grug is called a zombie after taking the world's first nap.

When Eep becomes a veg-a-eat-ian, the family hunts for the biggest veggies they can find -- until something makes them go back to eating meat.

Grug takes Ugga out to practice her hunting skills, but there are some kinds of animals that she just can't seem to catch.

Thunk saves the day when wacky beasts invade.

Eep invites her friends over for the first sleepover in history.

When Grug and Ugga go out on a date and leave the kids home alone, Eep throws the first-ever house party, which gets out of control.

Everyone loves it when Thunk uses shadow puppets to make the world's first movie ... until they see the end of the show.

After snobby neighbors move in next door and complain about a bone pile blocking their backyard view, the Croods start the first prank war ever.

Grug starts a fight with the moon.

A dare contest makes Eep and Thunk do something crazy at the Watering Hole, and Ugga must overcome her fear of water to save them.

Eep loves to compete, so she teams up with her new friend Lerk and plans to win a school hunting exam, no matter what she has to do.

When Gran moves into the cave with the Croods, she drives Grug nuts and embarrasses Eep in front of the first-ever group of cool kids.