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Solyaris (1972) More at IMDbPro »

Tokyo

Suicide by lethal injection.

In the ending of the video record he left for Kris Kelvin, Gibarian is seen with a syringe in his hand, then leaving. According to Lem's original novel, he hid in a wardrobe closet and injected poison there.

This image, water/rain inside buildings, is a common image for Tarkovsky. It is found in nearly all his films. A possible explanation for it in Solaris is that identifies the house as a creation of the alien on the planet. Throughout the film, this "intelligence" is not always accurate in its representations. The rain inside the house could be another mistake the alien makes.

"Ich ruf' zu dir, Herr Jesu Christ" Composed by Johann Sebastian Bach, BWV 639