When Jenny Shepard is in the hospital talking with the old man, she gives him a cigarette. The color of the cigarette box in her hand changes from red, to green, then back to red.
When Director Shepherd picks up Trent Kort in Paris, the interior shot of the car shows an agent in the front passenger seat looking into the back seat. When it switches to an exterior shot of the car, the passenger seat is empty.
Abby states that the phrase "grasping at straws" is ambiguous. It is not. The phrase does not refer to drinking straws, it refers to the shafts of wheat, barley, or other grain that are left after the grain is harvested, which is called "straw."