Washington investigates an explosion as ATF agent Doug Carlin. The film toys around with conventional ideas about time, and Washington said director Tony Scott based the premise on scientific fact.
"He said he didn't want to make a science fiction movie but a science fact movie," Washington told the CBS "Early Show."
"He did a lot of research about surveillance and what they are capable of and found out a lot of information about the whole investigation in London and those bombings and how they track all that stuff down. So the film was steeped in that reality."