In the big 'reveal', the suspect's white truck has a sticker with 'HTSU" in the rear windshield that is seen on the traffic camera. When the suspect is caught, several shots of the rear windshield show the absence of said sticker.
In the scene where Don is throwing darts and talking to Charlie, a green ball is visible on the shelf behind him just next to a bowl of what appear to be gum balls. Later in the same scene when Charlie walks away from the chalkboard and to his laptop, the green ball is now on a lower shelf.
At the beginning of the episode when the father becomes unconscious, the older son pushes his leg against his fathers to move his foot off the gas pedal and onto the break, but in the very next shot his leg is nowhere near his father's leg.
Larry mentions meteors and talks about how one day they will be able to stop them, as in prevent them from hitting the earth, and presumably, people. Once a meteor hits the earth, it is called a meteorite. Larry, as a cosmologist, would know this, and would use the correct term.