The Mystery of the Third Planet

The Mystery of the Third Planet Russian , Tayna tretyey planety, aka The Secret of the Third Planet is a 1981 Soviet traditionally animated feature film directed by Roman Kachanov and produced by the Soyuzmultfilm studio in Moscow. It is based on a childrens science fiction novella Alices Travel by Kir Bulychov, from Alisa Alice Selezneva book series.

As part of an expedition from Earth on the ship Pegas, Captain Zelyonyy, Professor Seleznyov and his daughter Alice Selezneva search for new animal species for Moscow Zoo. On the advice of the archeologist Gromozeka they look for with the help of doctor Verkhovtsev, the director of the museum of Two Captains, but the doctor behaves suspiciously doesnt show them diaries of captains and starts spying on the expedition. On the planet Blukthey make some valuable purchases, among them a Chatterer the bird belonging to the missing captain Kim. A suspicious fat man, Merry Fellow U, tries to steal a bird. Having listened to the speech of the Chatterer, the crew of Pegas heads for system of the Jellyfish. On the road heroes rescue robots of the planet of Shelezyak from diamond dust, admixed in greasing.On the third planet of system the Jellyfish Alice finds mirrors the flowers which are memorable and displaying everything that before them occurred. By means of mirrors heroes find out that on the planet there are Verkhovtsev and the Merry Fellow. In attempt to fly in a safe place of Pegas fails in a trap. Seleznyov and Green are taken prisoner to pirates, Alice manages to run. ........

Source: Wikipedia