The Missing Link () is a 1980 French–Belgian adult animated comedy film written and directed by Picha. Though it was not as successful as Picha's previous film, it was entered into the 1980 Cannes Film Festival. Plot The year is 196303 BC. A group of cavemen rises from the mud, and the first thing on their minds is finding something to eat. After two unsuccessful attempts, the group decides to eat one of their own. Suddenly, the men meet women, but do not know how to make love to them. The elder of the men sees a pair of stegosaurus performing doggy style, which inspires the elder to do the same thing with one of the women. Nine months later, that same woman is pregnant with two boys, Ah and O. The cavemen like Ah, but are frightened by O and abandon him. Meanwhile, a brontosaurus abandons one of her eggs. Both O and the baby brontosaurus Igua meet, and instantly become friends. Years later, while trying to feed O, Igua comes across a stranded egg. Before O can try to eat it, the egg hatches and inside it is a baby pterodactyl named Croak. Croak and O become friends as well, but Igua becomes jealous and does not want O to see Croak again. As O grows up into an adult, he meets up with Croak again, who tries to help O become smarter. Their first "lesson" is how to fly. As O tries to fly, Igua steps in and takes O away. The next day, O looks in a pool of water and sees his reflection and discovers that he is a man, not a brontosaurus. He decides to leave Igua and search for his own kind. As O sets out into the jungle, he runs into several creatures that he mistakes for men, including a wild boar and a giant worm. At nightfall, O becomes lost in the jungle and has an encounter with a menagerie of unusual creatures that nearly kill him. However, he soon finds Croak and the two fly away together. While flying, Croak accidentally crashes into a dimorphodon and drops O, thus separating the two. Elsewhere, Igua tries to get together with his own kind. He finds a group of brontosauruses at a nearby lake, but they reject him due to Igua smelling too much like "man". Igua is crushed and decides to