When Phil detects a meteor is hurtling towards the farm, the Bettermans and Croods must decide how to spend their last day on earth.

Tired of the farm's feud with the neighbouring punch monkeys, Ugga arranges a peacemaking summit where the Bettermans and Croods will stay in the punch monkey village to learn how to get along.

When a freak lightning strike turns Thunk into a genius, Phil is thrilled to have someone like-minded on the farm -- until the residents start asking Thunk for help with problems instead of him.

When the adults exclude the kids from their adult-only cave, the kids make their own much cooler cave, soon making the adults want to switch caves.

When Grug thinks his forehead looks too big in Ugga's family portrait, she strives to make the painting disappear.

When Phil invents a new game called ball-in-cup, everyone except Hope can't stop playing; just as Hope thinks she's rid the farm of the game, she finds herself addicted.

When Grug overhears Thunk accidentally call Phil "Dad", he tries to reconnect with Thunk by taking him to the natural spectacle known as "Big Shine."