Operation: Big Blue Marble.Kowalski invents a machine which combines fish and churros together to form a new food, the "furro." The process, however, produces a toxic byproduct, which is released in the form of blue bubbles through the vent of the lemurs' plastic volcano. Over the course of several days, the bubbles collect into an ever-increasing ball above the earth, and it begins to alter the weather inside the zoo and the Central Park area, with variable conditions occurring concurrently or in quick succession. Based on Private's observations after being sent into the atmosphere to investigate and a TV weather report, Kowalski concludes that the weather conditions are a result of the furro-creating machine's use and says that it should no longer be used. Skipper, however, does not believe Kowalski's conclusion and remains at the HQ while the others set off inside airplanes to destroy the bubble. When the mission runs afoul, however, Skipper suddenly appears to save them inside the penguins' rocket, only for them all to soon be shot into the bubble when Julien, who is there alongside Maurice and Mort, presses a button. Trapped inside without fuel, Skipper states that he now believes Kowalski's theory. All are then saved after the lemurs eat furros and their burp gasses are collected to be used as a fuel source, with the ignited rocket also causing the bubble to explode in the process.