As always, the sound options are phenomenal, including a 5.1 EX and a super-rare DTS ES 6.1 mix. When the audio gets a chance to work (basically during the time travel sequences) it's great. Voices fly around the sound field, the LFE gets plenty of work, and it all follows the camera movement. There are a few minor instances during the rest of the film that show off some nice separation in both mixes, although it's fairly standard stuff the rest of the time. (****)

All of the special features are contained on the director's cut of this dual-sided disc. Things start off with a commentary from the co-directors, Eric Bress and J. Mackye Gruber. Again, they only comment on the director's cut. The theatrical release is left unspoken on.

The first feature is a 9-minute glimpse into the actual science of the Butterfly Effect called "Science and Chaos Theory." It's all in plain English, explaining the basics and providing examples in case you still don't understand. It gives the movie a slight basis in reality.

"History and Allure: Time Travel" spends thirteen minutes with the concept of moving through time while giving a short history on movies that feature the topic. Some movies, like "Back to the Future," are dissected. It also covers just why people find the concept so fascinating. It's well worth watching after the film is over. The "Fact Track" is a usual Inifilm feature that subtitles the film with oddball facts about the current scene along with other pertinent information.

"Creative Process" is the longest featurette clocking in just short of 18-minutes. It's mostly owned by the directors who discuss the idea, how it came about, how to execute it, etc. They also talk about how personal the film is to them. Good stuff, much like all the extras here.

"Visual Effects" is one of those self-explanatory little features. Sixteen minutes are spent explaining how the time wipes came to be (including a few examples of what didn't work) and other assorted shots. Discussing those would be spoilers. Five deleted scenes clock in at about 3-minutes and have an alternate commentary track if desired. The set rounds off with a storyboard gallery, DVD-ROM stuff, and a trailer. (****)

The movie could be based on a story by Ray Bradbury (soon to be a movie in itself) called "The Sound of Thunder." There, a group travels back in time to the dinosaur era, step on a butterfly, and all sorts of stuff goes wrong in present day. It's the same basic premise here, just focusing on one person.