Some questions: first off, why does the Five-O get their own logo in this episode? They started calling themselves the Five-O as a joke, starting in the last episode. Now it's painted on the floor of their HQ. Nice use of tax dollars.
Second, how can a waitress at a café in Hawaii afford a brand new 2010 Chevrolet Malibu? Maybe I should move to Hawaii.
Third, why does the bad guy keep shooting hostages, even after the knows the cops are after him? Did he not want to leave a witness, even though he knew he was already being chased? Plus he fires off a gun in the middle of a crowded bank, when he's already trying to keep a low profile. Worst. Bank robber. Ever.
Other than that, this episode holds together better than any other episode since the pilot. The action was fun, 3 out of the 4 leads get some character development this time around, and the helicopter chase wasn't completely ridiculous (except for the awful CGI).
I dug the bit with the sister. I didn't dig the bit where McGarrett plays ten points of prison yard basketball but somehow fails to break a sweat. Still, this is better than any show with "CSI" in the title. 8/10.