Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Visible crew/equipment: As Michael leaves the House of the Rising Sun after asking about Tanya, the lighting rig is reflected in the dark lens covering the brake lights.
Visible crew/equipment: As Michael and Robin go to get into KITT on the firing range, the filming crew and equipment are reflected on the light cover on the back end of the car.
Just My Bill - S1-E6
Visible crew/equipment: As Michael walks over to talk to the guy KITT has cornered by the tan building, the shadow of the boom mic is on the building.
No Big Thing - S1-E8
Visible crew/equipment: After the sheriff radios to the trucker to stop Michael Knight, you can see KITT drive by another KITT parked on the side of the road in the overhead shot. (00:23:40)
No Big Thing - S1-E8
Visible crew/equipment: At the end, as KITT goes to jump the camper, there is a set of what appears to be mirrors to hide the obvious ramp.
No Big Thing - S1-E8
Visible crew/equipment: As the truck Devon is driving jumps the chain link fence, the helmeted and harnessed stunt driver is easily seen.
No Big Thing - S1-E8
Visible crew/equipment: When the camera looks at KARR's modulator, it appears to be nowhere in the futuristic dashboard.
Visible crew/equipment: As KITT starts back up the hill, if you look at the lower left side of the screen as he starts up, you see a black cable pulling the car.
Visible crew/equipment: At the Victory Academy, as the group walks by the brown sedan, the light rigs and camera crew and equipment is reflected on the side.
Visible crew/equipment: When the vehicle drives into the equestrian centre with the brown horsefloat on the back, you can see the shadows of the camera crew on the ground.
White Bird - S1-E19
Visible crew/equipment: After KITT cuts the plane in half, the camera looking on the left side of the plane is mounted to the wing's underside. A moment later, when KITT nears it, the camera is gone.
White Bird - S1-E19
Visible crew/equipment: As KITT goes to jump over the fence of the airport, the helmeted stunt driver is seen, as well as part of the ramp pops up into view. Also, you can plainly see that it's the lightweight stunt car, as you can see though it from the bottom.
Visible crew/equipment: At the end, as Michael and KITT do the run up to the jump at the tan van, the action camera can be seen on the lower portion of the passenger side.
Nobody Does It Better - S1-E21
Visible crew/equipment: When KITT jumps over the creek, as the angle changes to show the car in flight, the action camera for exterior shots is plain to see mounted on the passenger side.
Answer: I would say that unless there's visual evidence it was another K.I.T.T. car, as in you could see the bar scanner or cut steering wheel, people on here would correct the mistake by saying more than one 1982 Pontiac Firebird Trans-Am was sold and there's no reason it's meant to be a random car.
Bishop73