S1, E6: The Construction Zerbies have made a fun table-top obstacle out of a large pile of dirt. But Rex really thinks it could use something else. Zack and Rex set out to build a tunnel through the side, with the help of the other Construction Zerbies. But building a tunnel the right way turns out to be harder than anyone thought. Zack and Lily set out to find the leafiest place in the forest. But when they get there, they find there are too many leaves. They need to clear a path so Zerbies can see where they are going. They call Rex and Fill the front loader to help. But it turns out; moving leaves, like moving dirt, is a lot of work. So the Zerbies try to figure out a solution to their leafy problem. Chase the helicopter starts sleep flying while taking a nap. Zack and Lily try to wake him, but not before he crashes into a tree and gets stuck at the top. So Zack, Lily and Strut the crane try to free their sleepy friend from the tree.