Episode:

Pilot movie

I would call this one a flaw, as it doesn't make much sense...

When Fraser kicks down the door of the appartment, the one where they head out the window afterwards. The door brakes into two pieces, when knocking down a door would it brake into two pieces?

Free Willie

In this episode, while fraser and Ray are investigating the robbery that took place earlier on. While outside some men approach Ray's car, and then one of the windows is smashed on the right passengets door.

If you notice once that has been done, and the camera focuses inside the car and then back outside. To where the window was smashed, you can see it hasn't got a scratch on it let alone broken.

Gift of the wheelman

In this episode, during the chase scene Ray and Benton are after the father of the son who had parcipitated in a store robbery.

There is a part where both cars are heading into an alley, the wheelman's car turns right into another part of this alley and as that happens, the car slides left and hits a tyre which is the crash barrier caught on camera.

Burning down the house

In this episode when Fraser is in the boat with the criminal, as they get to the edge of the water fall and then away they fall. Then as they and the boat hit the water, what looks like a tyre can be seen in the water splashing up. Some sort of safety barrier?