Ep 4. Episode 4

Zack and Rex set out to solve the Zerby Town maze - something no other Zerby has ever done. But after driving to the center of the maze (which is the easy part) they get lost trying to get back out and have to call Chase the helicopter to come help them. But the friends decide to try, try again and set out to solve the maze on their own without the help of Chase. / Zack and Lily discover that Bob the boat doesn't have a garage.