Visible crew/equipment: Jack Bauer and his boss are in a building at night with a shooter hidden somewhere. They open a door and look very carefully to the right and then to the left before going through the door. On the right side you can briefly see two crew members and as the camera pulls forward they back up some so they won't be seen.
Continuity mistake: When Jack stops at the bus station to get a bag, we see a shot of Jacks car from the point of view of the guy who has the bag. You can see a quite big camera inside the car on the left side. When we see the reverse shot from inside of the car, the camera is gone.
Continuity mistake: The 6:00PM-7:00PM episode ends when it is still light outside. The 7:00PM-8:00PM Episode begins when it is completely dark (no sunset/dusk/twilight) The show is supposed to be in "real-time" but as the sun goes down it gradually gets darker, it does not just become dark from one second to the next. Also, the California presidential primary takes place in June. It is not even close to dark at 7pm in June.
Continuity mistake: When Jack drives to 18166 San Fernando Road he stops the car, gets out and leaves his phone in the car - you can see the green light of the phone's screen - he didn't reach for it. However, when Teri calls him, he has the phone in his pocket.
Continuity mistake: In the previous hour, Pattie has long straight hair down to her shoulders. We see this all the way through, even at the very end. Yet at the start of episode 22, when she is now at the party a mere 10 minutes later, her hair is very much shorter. There is no way she would be able to get ready for the party in that time, let alone have her hair cut.
Continuity mistake: During season one of 24, Jack answers his mobile to Gaines and we see footage of Jack on a CCTV camera. The CCTV footage shows medical staff moving, yet when they cut back to the camera in the hall the medical staff are in different places, they keep changing places and keep disappearing and re-appearing and the CCTV footage is about two seconds ahead of the footage in the corridor.