I love Pitch Black movie. In fact, it is one of my beloved movies and one of the best sci-fi movies I've ever watched. A perfect mix of horror, action movie and a drama, with colorful and interesting characters and same anti-hero. Chronicles wasn't so good but still was entertaining and fun to watch. So I'm even more disappointed now... Riddick was to be expected as returning to the roots; simply being a better Pitch Black, and proud continue of this great franchise. Unfortunately it isn't half as good as Pitch Black is. Moreover, it is really bad, BAD movie, so bad that I can't understand how David Twohy managed to do that. Riddick sucks in almost every way; it is a truly boring experience most of the time. Script is bad, dialogs are weak, like written by 10 years old. Characters are dull and empty - including Riddick character(Sorry, Vin). Only neurotic Santana seems to be at right place and feels somewhat interesting. Besides of Riddick, I'm truly disappointed in Dahl character - thought she would play a greater role than a plaything to our anti-hero. Not to mention Luna guy who brought to the movie simply nothing. Weak, weak, weak. Riddick is still a tough guy like he was expected to be, but this time he is just unconvincing with his cheesy lines and strange behavior. The only good thing is his bond with a dog, and really, NOTHING else. There is no tense, no dynamic in this movie. Riddick was supposed to be a predator so I thought he would be a real bad-ass finishing off his opponents one by one. But no. There's no single action with him worth to mention. And this one with Santana is a 'bit' awkward... I'm heavily disappointed in this film, in David Twohy and Vin Diesel. Sorry guys, but you totally let me down. Not recommending it.