After being shot, Christ runs to his car and puts it in gear before he starts it. Being equipped with an automatic transmission, this would not work. The car would have to be in park to start.
After Chris is shot, and arrives home, he collapses over the steering wheel. He never put the car in park, so it would have kept going until it hit something.
When McGarrett arrives to talk to Vashon about Chris' activities at the time of the robbery, he is told to enter through the servants' entrance to avoid Vashon's wife and daughters who are breakfasting. But in the ensuing conversation with Vashon, the family is seen sitting a short distance away.
When Honore is talking to Chris by the pool, a large blotch is visible in the top left of the screen. It's visible during both camera set-ups.
During the first robbery, Chris punches the face of the night clerk. How this ring can cut the letter into someone's face is problematic. The result almost resembles a stamp.