When Senator Palmer is talking to his son, the clock reveals the time 4.57, however just seconds before had the "24" clock shown 4.37.
When Gaines shoots Dan, he aims at a slight angle so the fatal wound would be in his chest, but when he lies dead in the next episode, it's in his head.
A camera moves into the shot on the right when David is talking to his daughter.
When Jack is walking down the corridor, a tripod and piece of wire is clearly visible on the right.