 The big yellow teddy bear Bamse travels to the small distant planet Joakim. Bamse is in a good mood and looks forward to meeting the inhabitants of the planet. Once he arrives he watches television with a strange double-headed animal called Forlæns and Baglæns, one head at a time. Bamse also finds out that the animal likes to drink fruit juice from a bucket. Bamse meets Arthur who is caretaker of all the planets in the sky and travels in a pear-shaped spaceship with the number 42 on it. Arthur is in a mighty hurry, but he takes it easy and tells imaginative stories and teaches Bamse how to bake bread in an oven.