What Happens in Granny's Attic, Stays in Granny's Attic

In round one, two lovebirds battle it out against a mother-daughter duo on the supermarket stack. In round two, a married couple, who is the life of the party, take on a tightknit pair of twins on the granny's attic stack. The winners from each round face off against the national parks stack to earn a shot at The Mega Stack and a chance to win the grand prize of $250,000.