Abandon hope all ye who enter Stephen Gaghan’s directorial debut expecting it to build on the promise of his Oscar-winning ”Traffic” screenplay. As a long-lost ”Dawson’s Creek”/”Law & Order” crossover, however, it ain’t bad. Once again, as on ”Dawson’s Creek,” Katie Holmes plays a head-of-the-class undergrad who’s oblivious to her knee-weakening effect on men; and as he once did on ”Law & Order,” Benjamin Bratt plays a brooding detective — only in this case, he’s investigating the disappearance of Holmes’ rich-brat boyfriend (”Undeclared” alum Charlie Hunnam).
Sometimes, typecasting works: Holmes and Bratt settle comfortably into their roles, and the movie proves a competently made, mildly diverting collegiate thriller — at least until its all-too-predictable ”twist” ending. Among an overachieving supporting cast, Zooey Deschanel (”The Good Girl”) and Melanie Lynskey (”Heavenly Creatures”) score the highest marks as two of Holmes’ loopier classmates.