Caillou, Daddy and the twins Jason and Jeffrey pretend to visit the Antarctic; Caillou gets to know a new girl named Lee Wuhn; during a family trip, Caillou imagines hunting for alligators in a bayou. "Caillou of the Antartic" - Caillou is outside playing with the twins Jason and Jeffrey. The twins play rather energetically and Jeffrey accidentally falls over on Caillou. It gives Caillou a bit of a headache and he's somewhat upset with Jeffrey, though Daddy tells him that these sorts of accidents can happen when you're playing. Still, Caillou feels that maybe Jeffrey could have been more careful. Just then, the ice cream man shows up on a bike. He sells "Antarctic" desserts, such as Chocolate Icebergs, which gives Daddy an opportunity to tell Caillou, Jason and Jeffrey all about the South Pole. Jeffrey says that's where Santa lives, but Daddy clarifies that Santa is at the North Pole, the Arctic. The Antarctic, or South Pole is at the bottom of the Earth and that's where penguins live. Caillou imagines that he's at the South Pole, eating a "Chocolate Icecreamberg." Caillou then comments on how "cold" he is and Daddy jokes that he must not want to use the sprinkler then. Caillou says he was only pretending. Daddy eventually relents and Caillou has some fun in the sprinkler. Caillou then accidentally steps on Jeffrey's foot. He asks if Jeffrey's all right, and apologizes. Jeffrey says that he's okay and Caillou realizes that he's no longer mad at Jeffrey for falling on him. "Deep Sea Caillou" - Caillou and his friends are at playschool, playing tag and each pretending to be a different type of animal. Just then, a new girl and her mother appear. Caillou greets the new girl and invites her to join in the tag game. However, it seems that she's a bit shy. Inside the classroom, the teacher Ms. Martin introduces the new girl as Lee Wuhn. She also shows the class something else new --- an aquarium that the elementary school donated because they just got a new one. Ms. (thetvdb.com)