Continuity mistake: The original plane is a 747, (four engines on the wings, two aisles). The plane that Reid gets the plans for is a 727 tri-jet (three engines on the tail and one aisle, not wide body). The plane in the walk through by Reid is a wide body of some sort, but not a 747 (two aisles with three seats in the middle).
Factual error: Rossi recognizes a "typical Dutch gesture" The suspect hits his forehead with his hand and then moves it towards another person, saying that the person is "crazy" This gesture is German. In the Netherlands we use a different gesture. We point to our forehead with our index finger and then point at the person we think is crazy, with that same finger.
Visible crew/equipment: When Hotchner, Callahan, JJ, and Rossi surround Frank's car on the private property, just after Callahan sees the leg on the seat, when she opens the passenger side door the reflection of the standing male cameraman/crew member is visible on the surface of the car, between the windows.