At the office (when Gibbs asks the P.I. where he found McAllister), McGee is standing to Gibbs his left and then the next moment McGee is standing to his right, only to magically reappear back to the left of agent Gibbs.
As can be seen from the stripes on McGee's tie, Gibbs's parting and the button hole on his jacket lapel, and the background decor and door placement, the shot is horizontally flipped for reasons unknown.
While driving in the car and discussing why a rich person would join the service, Kate comments to Tony saying she thought his parents are rich, and he says they are. Later in the series, it is said that Tony's mother died when he was young, only his father is living.
When McGee expresses his disbelief that a personal hero tried to frame someone for a murder, Tony consoles him by mentioning similar feelings he had about learning professional wrestling was fake. While it became an open secret during the Monday Night Wars that match outcomes are pre-determined, there is also a degree of realism to pro wrestling; many of the moves wrestlers perform are dangerous, and injuries can be both career-ending and life-threatening: Darren Drozdov fractured two discs and was paralyzed from the neck down after a powerbomb was botched; Mick Foley was knocked unconscious for several minutes after being chokeslammed through the sixteen-foot high Hell in a Cell cage at King of the Ring (1998); and perhaps most notably, Owen Hart died from blunt force trauma at WWF Over the Edge (1999) after falling into the ring from the arena rafters when his safety harness malfunctioned.
Gibbs 'proves' Cooper shot at the psychic with a chemical gunshot residue test on the sleeve of Cooper's trench coat. However, the only thing that proves is that somebody discharged a weapon while wearing that coat. It needs not even have been worn by Cooper. In any case it does not prove Cooper fired at the psychic. A super sleuth, Cooper would legally own a gun, probably along with a concealed carry permit. And there are any number of legit reasons for him to have fired his own gun, like training, test-firing...
When Abby is checking the evidence, she's wearing rubber gloves, both to keep from contaminating the evidence, and to keep from contaminating herself from whatever bacteria is on the stuff brought up from the bottom of the lake. Yet she uses her keyboard and mouse without taking the gloves off, leaving the bacteria on them for herself, or the next person to use the computer without gloves.
Abby identifies the .45 slug from the car as a hardball round. It is actually a solid lead Keith type or semi-wadcutter.