9. David Caruso
Worst Performances: Jade (1995), Session 9 (2001), CSI: Miami (CBS, 2002-present)
David Caruso is like the kid back in school who thought he was cooler than he really was, and who can stand that guy? Something tells us he grew up idolizing James Dean, because his performances are frequently soaked with the air of a bad Dean impersonation. On the inexplicably successful CBS series CSI: Miami, Caruso spits out corny puns and groan-worthy dialogue as if he's reading from the Book Of Cool. And then there's the above scene, taken from the underappreciated '01 psychological horror pic Session 9, in which Caruso is the weakest link. Click the Play button to witness one of the worst line readings in cinematic history.