Plot hole: Upon learning from one of Edward Linney's fellow classmates that he is staying at Parklane hospital, Gray and Darby head right over to see if he can identify "Garcia" from the photo. At the hospital, Gray distracts the receptionist while Darby sneaks in. She runs upstairs and goes straight to Edward's room. How did she know to go upstairs and which room Edward was in? The friend never tells Gray, Edward's home phone was disconnected, and at the hospital, Darby doesn't speak with Gray, he just waves her in. (01:38:25)
Plot hole: Darby goes to great pains to get out of the country, to where no one will know where she is but Grantham. But upon reaching her "secret" destination, a van pulls up to the plane and a man gets out and hands them an envelope with a copy of the front page of the Washington Hearld with their breaking story and both their names as by-lines. That couldn't happen unless other people besides Grantham and the pilots knew her destination.
Plot hole: Darby and Gray are surprised to learn at the end that the guy who tried to kill her in New Orleans was Khamel. Given that Khamel was (a) a wanted terrorist, (b) the prime suspect in the judges' assassinations, (c) shot in a public area in front of many witnesses and (d) holding a recently used handgun when he died, this would have been breaking front page news along with his name on newspapers and news shows. Ridiculous to think they had to find out from Voyles who he was.