Jake Gyllenhaal has played a variety of guys, from vulnerable to secretive to downright spooky, but Louis Bloom has got to be his oddest, most fascinating creation yet. The disarming and wholly engrossing way he develops this cryptic character, on top of first-time director Dan Gilroy's knack for subtly building suspense before lowering the boom, makes "Nightcrawler" one of the year's most satisfying and original thrillers.