Ep 4. POP UP, UP AND AWAY! /The Pop-Up Christmas Calendar

Convinced they can't be heroes without capes and masks, Zack and Quack head to Pop-Ville to get superhero costumes. But when the friends run into lots and lots of people in need of heroic help, they'll have to find a way to be super without their costumes. / Zack gives his friends a special pop-up Christmas Calendar to help them count down the days until Christmas. But when Quack and Fluffy accidentally lose all of the Christmas surprises that pop out of it, they have to find a way to make it right.