Continuity: In the episode, "Year of the Tiger" when Danny is driving Mr. Zhao in his convertible at night, you can really see that the background is a bad fake and since even though Danny is driving with the top down, his hair and clothing does not get ruffled at all by the wind.
Plot hole: In episode 5-2 Shrink Wrap
The man plays his last nickel and wins the jackpot. You have to play the maximum number of coins to hit the huge jackpot which on that machine states is 5 coins.