S3, E25: Peter Polar Bear is unhappy about something. His friend the Polar explorer Professor Magneticus, hasn't been in touch for a long time. Carla Caramba is also worried about the Professor. She wants to look for him at the North Pole. Together with Benjamin, Otto and Peter Polar Bear she sets off on the journey. When they reach the Arctic Sea, a little polar bear needs their help. And then they even meet some Eskimos, who are not at all happy about these unknown visitors. Will they ever manage to find the Professor?