When Skinner follows the Tunisian diplomat into the parking garage and stops there, he gets shot at by the diplomat. He ducks to the side and shoots back twice, when the diplomat rounds the Skinner's car to look inside. When he gets out of the car, the slide of his pistol is in the rear position. While following the diplomat between the parked cars, the slide is in the forward position, and after the diplomat gets hit by the car and Skinner is having his seizure and falls with his back on one of the parked cars (the car's alarm goes off when he drops on it), the slide is in the rear position once again.
Starting at about 1:25, when Skinner flat-lines, the blond nurse, standing next to the young doctor wearing glasses, sets her clipboard down and then squeezes something from a tube on to the defibrillator paddles. At about 40:30, when Skinner flat-lines, the same nurse cannot be seen repeating that step in the procedure.
When Skinner falls back onto a parked car in the parking garage, causing its alarm to go off, there's no way he hits it hard enough to cause the large dent that appears.
The title S.R. 819 is incorrect. Throughout the dialog various characters refer to the legislation as a bill. Thus, the correct title should be S.B. 819 or Senate Bill 819. A bill is the principal vehicle employed by U.S. senators for introducing their proposals in the Senate. A Senate bill requires the approval of both chambers of Congress and is submitted to the president for possible signature into law or for a possible veto.
(at around 45 mins) Alex Krycek closes the panel on the remote device with his left thumb. In "Terma" (#4.9) Krycek had his left arm amputated. He is seen in a number of intervening episodes with a prosthetic limb.
Right after the theme song, as the camera zooms out from Skinner's face, you can see on the right hand edge of his nose where the vein makeup has started to come off of his face.
When Senator Matheson drives up to the power plant and gets out of the vehicle, you can see a member of the crew moving backward reflected in the open door of his Mercedes.