![Hey, Mister, Let’s Play! How They Went to Sleep Poster](https://image.tmdb.org/t/p/w500//3K7qIDLUo1rtkIqpe6QNYykvw7T.jpg)
Hey, Mister, Let’s Play! How They Went to Sleep
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September 13, 1968
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Animation
Featured Crew
Břetislav Pojar
Director
Břetislav Pojar
Screenplay
Miroslav Štěpánek
Art Direction
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Cast
![Rudolf Deyl](https://image.tmdb.org/t/p/w300//hLnwYb9A2siZCZp256EbJZNgt5F.jpg)
Rudolf Deyl
Narrator (voice)