Filming penguins in Antarctica, Eliza begins practicing for her future profession as a vet, when she comes across a wounded penguin. She rescues her, but may have made matters worse by separating the penguin from her mate and her egg. When she borrows a snow speeder to get back to the penguin breeding grounds, will she make it in time to put things right? (Since Nickelodeon aired all the Thornberry episodes out of production order,they aired this as part of the 5th season.Its actually part of the 4th season) (thetvdb.com)