Revealing mistake: Callan chases bad guy Ethan through the yard. Ethan runs down a set of stairs and towards the camera, before hiding between tanks. While running, Ethan's face is fully visible and it is very clear that it is not actor Charles Esten.
NCIS: Los Angeles (2009)
1 revealing mistake in Pushback - chronological order
Starring: Chris O'Donnell, Linda Hunt, Barrett Foa, Daniela Ruah
Visible crew/equipment: In the rec hall, when Kensi feigns sickness while posing as a cadet the gunman jumps off the stage, and as Kensi bends over the small rectangular bulge of her mic pack can be seen at her back. (00:30:25)
More trivia for NCIS: Los Angeles