The System - S1-E2
Continuity mistake: Jim approaches the secret agent on the usual convoluted way to the mission briefing. The peanut vendor mentions the quarterback, and behind him there is a person walking in the tunnel. Switch to a new shot and there are two. (00:02:40)
The System - S1-E2
Visible crew/equipment: Jim Phelps gets the disk system from the locker. He then takes a step back and looks around the room figuring out where to sit to play the recording. As the camera moves to follow, a boom mike gets in frame in the right corner. (00:03:00)
The System - S1-E2
Continuity mistake: Grant begins to remove the screws from the vent starting from the right side, but the top row is already missing and unscrewing 2 on a single side already makes the vent wobble significantly before the camera cuts away. (00:14:00)
The System - S1-E2
Continuity mistake: Casey is having a chit-chat with the villain/stooge of the episode, playing dumb and pretending to have a ridiculous 'system'. As she says that whenever she loses she doubles the bet "three times in a row", her hair goes from behind the shoulder to the front of the shoulder. (00:16:05)
The System - S1-E2
Continuity mistake: When Nicholas distracts Chuck the security guard with a phone call (terrible plan, since he tells him to search in a spot awfully close to the monitor he's supposed to be distracted from), he touches the papers next to the monitor and the pen in front of it, but when it cuts to him looking at the recording while Grant is working the safe, the objects are in the exact same position as before when he was looking at the money count. (00:19:55 - 00:26:15)
The System - S1-E2
Other mistake: When Nicholas impersonating Marley is going through the security cameras of the casino (none of which catching the 'double Marley' on camera exposing the trick, conveniently) there is one that follows with a cinematic motion the exact movements of the person answering the phone. They are all static cameras, just that one arbitrarily moves, without Nicholas doing anything. (00:36:50)