Hala I Ke Ala O'i'ole Mai - S9-E11
Character mistake: Ensign Rollins is shown in her office in a flashback. Her boss comes up and addresses her as "Lieutenant Rollins". An Ensign (O-1) is not a Lieutenant (O-2 or O-3). (00:32:40)
Hana Mao 'ole ka ua o Waianae - S9-E25
Character mistake: An escaping criminal steals an airplane and proceeds to take off. Let's not even discuss how a non pilot with just flight simulator time and no instruction could even do such a thing, especially starting it by watching a computer. What would never happen is that when confronted with a group of police cars in his way trying to prevent his takeoff, only then does he proceed to advance to full power. All takeoffs are done with full power from the beginning, otherwise you run the risk of never taking off at all. (00:31:40)
Hana Mao 'ole ka ua o Waianae - S9-E25
Character mistake: The bad guy escapes on a private jet, narrowly avoiding being run off the runway, and he breathes a sigh of relief, thinking he's got away with it. But anyone with half a brain would know full well that given the cops know the plane he's in and where he started from, it's no challenge at all to track him, and at an extreme scramble a fighter to escort him back / shoot him down.
Chosen answer: They are Junior's SEAL buddies.