Revealing mistake: When the two wildcats throw hand grenades at the Visitors, the grenades are obviously fake because the explosions do not occur at the same place as where the grenades land. The detonations have obviously been located in a safe place away from the actors. (00:11:50)
Visible crew/equipment: When Julie says 'We're gonna stand and fight' near the end of the episode, a boom mike briefly creeps into view at the top of the screen. (00:42:15)
