When the car is fished out of the water, it has no rear window. When McGarett arrives a few minutes later, the car's rear window is intact.
Harry Endo's "Keoki" character is listed as "Kaspar" in the credits.
When McGarrett takes the phone call from Danny, he fails to hang up the telephone correctly.
Driving down the one-way street the wrong way.
The final scene is set in a currency exchange office in Hong Kong, but there are signs promoting the use of US Zip codes, and others advertising the purchase of US stamps.