'De Grot' is a terrific Dutch thriller, based on the book written by Tim Krabbé. Another of his books, 'Het Gouden Ei' was made into the great Dutch mystery thriller called 'Spoorloos' ('The Vanishing') in 1988. This one is not as good as that thriller (although much better than the American remake also called 'The Vanishing') but there are times it comes close.
Especially the opening moments are terrific. We see a man, later we learn his name is Egon Wagter (Fedja van Huêt), coming from a plane in Thailand. When he picks up his bags it is pretty clear that he is smuggling something across the border. These scenes are perfectly directed, photographed and acted. A kind of suspense is created that you would normally not have in an opening scene like this. Later we see how Egon makes his deal in Thailand with a woman, both stating that they have never done anything like this.
From this point the movie is constantly flashback and flash-forward. We see how Egon, still as a child (here played by Erik van der Horst), befriends a guy named Axel (as a kid played by Benja Bruijning). We learn how they grew up as friends, sort of, and how Axel (as an adult played by Marcel Hensema) became a criminal. Egon in the meanwhile goes to college and settles with a woman. Around this time he sometimes meets Axel but does not really want anything to do with him.
The movie is chronological in a way. It shows Egon and Axel as kids, than as students, young adults, and in their mid-thirties. But from time to time, like I said, the movie goes back to when they were kids and jumps forward again. Every time we see them as kids it explains something that happens when they are adults.
Minor spoilers herein.
The title means 'The Cave', and it is the cave that gives the movie its happy ending, although it is in fact not that happy. Like the beginning, the ending is terrific. The middle part of the movie is entertaining and in a way it distracts our attention of the first scenes, only to come back at that point in the end. It is the editing that gives the movie its happy ending, although we can say the dramatic ending is happy in a way as well.

I wasn't really fond of the first "Cube" movie. It was a good idea, but the annoying acting and characters always kept me from liking it too much. Didn't really feel the need to see its sequel but when I heard they were making a third movie that would act as more of a prequel to the original. I was intrigued, thinking that maybe they would fix some of the original's problems and provide us with a memorable cast of characters. Well I thought wrong.
"Cube Zero" starts well enough by introducing us with the two characters in charge of watching and maintaining the never-ending maze of traps that plagues the people in the Cube. The filmmakers succeed in providing a sense of mystery with the establishment of the two men's daily routine. Several questions are created from it, concerning the reason why people are send there and also the true nature of the ones who run the entire operation. All of which are left entirely to the viewer. The acting was a bit weak but all in all the movie's first half moved relatively well.
With the story moving on, one of the two "watchers" begins to develop serious doubts about what he is doing. And later decides to go and help a group of the people trapped. Here is where everything rapidly starts to dissolve into dull cheese.
Sent by the people who run the Cube program we are introduced to the character "Jax". Along with his two underlings play a major reason as to why this movie is failure. To start of "Jax" looks and talks more like a third rate villain taken directly from a James Bond movie complete with the ever "popular" glass eye, that alone ruins any atmosphere created by the first half's relatively nice pace. Whats more is that it begins to feel more like a comedy rather than a serious movie. With some incredibly corny lines, perhaps the screenwriter got bored and didn't care. The acting itself degrades to a further low when the former "watcher" meets the group in the Cube. The entire interaction is painful to watch as is everything else following it.
Again failing to impress on anything but weak characters, dialog and acting "Cube Zero" is a waste of time for those searching for a good horror movie.