Factual error: Empty Planet Episode: In the opening sequence a bomb is detonated on a bus in Seattle, in the vicinity of the Seattle Center/Space Needle. Right after the explosion, as people are moving towards the now smoking bus you can see a palm tree in the background. There are no large palm trees in metropolitan Seattle and absolutely none in this area.
Factual error: In Season 4, episode 1 "Mayhem", Morgan is following a suspect into the subway tunnels. As he is coming around a corner, you can see the tracks behind Morgan. The tracks are three straight pieces of track making a corner. There is no way a train can make a corner on straight tracks. There should have been curved tracks.