Plot hole: When the students are breaking into ETS, they take great care to avoid the security cameras in the lobby; donning masks, crawling on the ground, etc. Yet a bit later, two of them go back to guard the same lobby, they are seen walking around and sitting on the desk that they so carefully crawled past earlier.
Continuity mistake: In Desmond's car, Roy puts on his left sock first, then crosses his right foot over his lap. The shot switches behind him and he is putting his left knee up into the frame. The angle changes again and he puts the sock on his crossed right foot. (00:34:15)
Francesca: You look like a slut. I like it.