Michael says if the person you use the stun gun on is touching you, you'll get shocked as well. This is untrue. A stun gun or taser only affects the person who is touched by the electrodes. Even if they are in contact with the person when it occurs, only the person who's muscles are contacted by the stun gun is affected.
Infrared cameras, contrary to the narration and imagery shown, cannot see through walls or windows to see where "heat spots" are. In fact, the infrared camera being pointed out of the windshield, as in this scene, would see the reflective thermal energy from the camera operator only. Building walls block infrared waves. Glass reflects infrared waves, like a mirror reflects visible light waves.
At about 12:46 in, Michael examines Ivan's Florida driver's license. There are at least 3 things wrong with the license: 1) the license shows his name as "Ivan Petrov", but the name would be listed with last name first; 2) the license number starts with the letter "L", but FL license numbers start with the last name of the licensee, in this case "P" for Petrov; 3) the license shows Petrov's birth date as "01-19-1961," but digits 8-9 of the number are shown as "65" when they should be "61".
Carla's business card shows a "P.O. Box" (i.e., Post Office Box); but Michael stakes out a private mail-drop service, whose customers would not have "P.O." addresses.
Sam says they are going to an old concrete plant at the edge of the Everglades. The plant is actually a cement plant not a concrete plant. It manufactured the powdered cement which is one ingredient in concrete. Concrete is made with cement, water, sand, and gravel. In addition, it was not abandoned at the time the show was on the air, it was a quarry which mined and sold limestone gravel.
The prop "stun gun" that Fiona attempts to use is seen clearly from the "business end". When activated, the electrodes do not produce an electrical arc, and you can see a clear rectangular window with a strobe light behind it which simulates the light of the arcing electricity without damaging the actors.