Continuity mistake: In scene where Kono makes origami crane, she sets it down on top of Evan's Ipod. Next shot the crane is sitting next to the Ipod. (00:26:30)
Continuity mistake: In scene where Chin starts reviewing footage of white van attacking, in first shot a wheel from the NSA guy's van has rolled off and comes to rest immediately in front of attacking van's driver side front wheel. In next shot as driver exits, loose wheel is missing. (00:11:20)
Ko'olauloa - S1-E6
Continuity mistake: When McGarrett chases the bad guys' Jeep, his Camaro skids through several huge dust clouds. Immediately after each cloud, however, the car is perfectly clean again. This is visible in several of the very rapid shots throughout the chase. After the chase ends, a coating of dirt and mud (which, incidentally, differs from the earlier shots) appears on the Camaro.
Continuity mistake: When Danny goes to the police station and Grace runs to hug him, her left arm switches from being around his neck to under his arm.
Chosen answer: They are Junior's SEAL buddies.