After a terrorist explosion kills the passengers on a New Orleans ferry, an ATF agent (Denzel Washington), discovering that a form of time travel can send him back to the event, resolves to save the life of a woman (Paula Patton) killed shortly before, as well as prevent the explosion. The story recalls Otto Preminger’s Laura (1944) in its romantic moodiness and has some of the philosophical poignance common to tales of time travel. But the SF hardware (enjoyable) and thriller mechanics (mechanical) of this Jerry Bruckheimer slam-banger don’t mesh very well with reflection, and the action trumps most evidence of thought. Tony Scott directed a script by Bill Marsilii and Terry Rossio; with Val Kilmer and James Caviezel. PG-13, 128 min.