It takes a long time for any considerable dramatic or psychological weight to settle in, and by then it begins to telegraph. It doesn't help that Preminger shoots it like a hack, every exaggerated sweep of the camera calling attention to itself. The acting is mediocre, with the notable exception of Olivier. It skirts by on morbid curiosity until that god awful final sequence.

This feels like a 2 hour Twilight Zone episode. With that in mind, yeah, it gets a bit corny (especially the final moments), but it's also extremely entertaining. Carol Lynley, Keir Dullea and Laurence Oliver all have solid performances. There's a lot of nice photography too, which was unexpected.

Engaging mystery right up until the big revelation. I find it unbelievable that the brother, who is a level-headed guy through the first two acts, suddenly regresses to the mental age of a six year-old. It just seemed lazy. Ditch the child's play and wrap it up with an age-appropriate finale, and you have a great flick. As it is however, completely forgettable.

A very well-made mystery/thriller. The ending, which some have deemed corny, is also somewhat bizarre, for better or worse, but altogether this is effectively fascinating and mysterious.

There's a plot turn later in the movie that's a total howler, but this is an absorbing and unique motion picture. Great cast and welcome musical interludes by The Zombies

Now, let me get this straight: during the first half of this film, I was mesmerized, thinking "what a flawless masterpiece!". Then, things changed to a dual point of view. SPOILER: Then, a predictable plot twist came by, then another, and there ya go: a would-have-been-perfect movie is almost ruined by an awful ending. But, it got a lot of style, anyway anyhow.

Effective thriller. Carol Lynley is surprisingly good, Kierr Dullea is fine also, and Olivier of course steals the show.

The twist ending's too bizarre for its own good and the audio is a little shaky at times, but the photography, music, and performances more than make up for it, although it's hard to see Keir Dullea as anyone other than Dave Bowman after all these years.

With a cast and camerawork of this level, I can only marginally fault the predictable twist. Has that unusual atmosphere that you only get from these 60/70s sleeper hits.