Visible crew/equipment: In all of the shots of Elizabeth and Jacob facing down the highway, there is a black piece of equipment protruding from the left side of the screen. (00:42:20)
Continuity mistake: The Visitor craft that Mike and Ham capture is not the same type that is seen later entering the hangar. The first one is a small shuttle, the second is a transport, distinguishable by the windows on the side. (00:20:10)
Revealing mistake: When the building explodes at the end, the white limousine parked in front of it completely disappears instead of exploding. (00:45:20)
The Sanction - S2-E5
Continuity mistake: When Sean throws the car keys away after punching Ham, Ham's head is above the steering wheel. In the next side-on shot, his head is much lower. (00:28:20)
The Overlord - S2-E7
Revealing mistake: When the girl cuts her hand with the broken bottle, the glass never touches her hand. The blood looks really fake too.
The Sanction - S2-E5
Revealing mistake: When Kyle rescues Elizabeth from the theater, if you look closely at his face he has been replaced by a stuntman. (00:12:50)