Give Me Liberty... or Give Me Death - S1-E15
Revealing mistake: When the van overturns at the end of the episode, you can easily see the padded roll bars used to protect the actors inside. These bars don't appear anywhere else in the episode.
Revealing mistake: When K.I.T.T turbo boosts near the end when chasing the 4x4 you can see the camera strapped to the side of the car. (00:42:35)
A Nice, Indecent Little Town - S1-E17
Revealing mistake: In the scene where Michael chases the counter fitter and KITT supposedly jumps over some cars with his turbo boost, you can see a jumping ramp which wasn't there before, painted in the colour of the street behind it. (00:25:25)
White Bird - S1-E19
Revealing mistake: When Michael crashes through the side of the plane, you can see a pulley attached to the front wheel of the plane, which then is released. (00:40:15 - 00:40:50)
White Bird - S1-E19
Revealing mistake: When Michael grabs the newspaper to read about Stevie's abduction, all paragraphs are the same one, starting with the words "The facts".
Revealing mistake: At the beginning when Michael has KITT move the truck, you can see the dolly apparatus that makes the truck's rear end swing out.
Revealing mistake: In the scene where two truckers try to smash up KITT with baseball bats, and KITT supposedly moves a bit backwards by himself, you can see someone 'helping' him near the passenger's seat.
Nobody Does It Better - S1-E21
Revealing mistake: When you see KITT driving after Michael is released from prison, you can see that it is a stunt driver and a normal steering wheel. The driver also isn't talking yet we hear Michael's voice. (00:15:50)
Answer: KITT didn't choose to go off the cliff in Goliath Returns, it just happened as he tried to avoid Goliath. Just 'cus it happened, doesn't mean It's gonna cure his fear of "flying"