The Mystery of the Third Planet

The Mystery of the Third Planet (Russian: Тайна третьей планеты, Tayna tretyey planety, also translated as 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 1964 novella Alisa's Travel by Kir Bulychev, part of the Alisa Seleznyova children's science fiction book series. The movie is considered a cult classic in Russia and was included in various lists of the best animated films and science fiction films. A shortened novelization of The Mystery of the Third Planet was written by Bulychev himself, with other adaptations including a diafilm and a number of video games. The 2009 feature film Alice's Birthday is considered a spiritual successor of the work.

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