Solaris

Two truths drive this film: the inadequacy of human-kind to understand the Universe, and the inadequacy of human-kind to understand the human heart.

As such, using Lem's original idea, Tarkovsky successfully, explores these themes.

We are drawn in, through hauntingly beautiful imagery, to the internal struggles of Kris Kelvin as he attempts to understand feelings of love for his suicided wife, who has been mysteriously resurrected, presumably as an attempt by Solaris to communicate, or torture.

Of course Solaris is probably the most original alien ever concocted, (no phone-homes here) and as must be, utterly enigmatic and beyond communication.

Be warned, this film is very long, and sometimes slow, but for those who consider themselves science fiction addicts, it is a must view.

One of the top 5 sci-fi films of all time.