S1, E38: While on vacation in a South American jungle, the Rangers discover that the chocolate producing Cacao trees are mysteriously disappearing. That night, while everyone is asleep, Dale sneaks out of camp to indulge in a candy binge, a habit he had promised to break. While he is away, a swarm of Mosquitoes sting all the people and animals -- including the Rescue Rangers-- and turn them into zombies. Dale watches as they uproot the trees and transport them upstream. The next morning, the Rangers don't believe him, thinking he's just making up stories to cover his snacking. By following the trail, they discover a Mayan Pyramid that is the chocolate factory of Heinrich Von Sugarbottom, a Swiss chocolate chef.