In the beginning when McGarrett is running on the beach, he pulls a small boy from the waves. The boy's hair is wet. A few seconds later when McGarrett returns the boy to his mother, the boy's hair is dry.
Joseph Trinian wears a navy chief's uniform, but the chief's anchor devices are missing from his collar.
When Williams is told that McGarrett was going to attend a gun control meeting the next day, he said that the meeting was one day too late. However, it was already illegal for Trinian to have a gun as a convicted felon, so additional laws would not have done any good.
More than once, tires squeal on unpaved roads.