At the end of the show Jack and Teal'c give the device to Tanner and his men and they "beam" up to their ship. As Teal'c turns and walks away you can see through his shirt to the trucks behind him.
At around the 32:50 mark, when O'Neill, Teal'c and Martin arrive at the outdoor set in a red car, the (real) camera crew is very clearly reflected in the car's door.