Immediately after Nadia blows up the government computer, you can see the USB drive that she was using still in the USB port. After the commercial break, Shawn finds the burnt USB drive on the floor.
Agent Driggs passes Tom Fong twice when exiting the surveillance van.
In the scene in the women's restroom, Franka Potenta character, "Nadia" takes off her backpack, the camera angle changes and she takes it off again.
When Shawn and Gus are standing still in the beginning scene, the amount and shape of the ice cream on their cones changes back and forth.
While talking to Nadia in the park Shawn's hand jumps to his chin between shots.
At one point, Nadia says there's an F-14 inbound to shoot down their helicopter. At the time of airing (2010), the F-14 had been retired from service for four years by the US Navy. Iran has been the only country to operate that aircraft ever since.