Jake Gyllenhaal in Enemy.

Enemy features an awesome performance from a great actor playing somebody who might be a little sick in the head.

Gyllenhaal plays Adam, a college-history professor who reeks of insecurity and has a guilty vibe about him. He has a beautiful girlfriend (Mรฉlanie Laurent) with whom he seems to be having a few sexual problems. Heโ€™s having bad dreams in which the arachnids show up, and he seems depressed most of his waking hours.

When Adam watches a movie in an effort to cheer up, he spies what appears to be himself playing a bellboy. Weird. A little research reveals that the bellboy is Anthony (also played by Gyllenhaal), a bit-part actor who is Adamโ€™s doppelganger.

Anthony is married to Helen (Sarah Gadon), and while full details arenโ€™t given, it seems as if Anthony has been unfaithful in the past. Unlike the confused and sad Adam, Anthony is very regimental and bold.

Denis Villeneuveโ€™s film is far superior to Prisoners (in which Gyllenhaal co-starred), a film that started strong and spun out of control. Enemy remains morally and thematically twisted throughout.

While the DVD isnโ€™t due until June for this one, you can download it via iTunes, and get a making-of documentary along with it. Oddly enough, even though it is available for purchase on Amazon.com and iTunes as a download, no Blu-ray release has been set yetโ€”only DVD. This is just another sign of the changing landscape in home video releases.