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 Steve and Danny enter Bar 35 it's daylight, and when they leave after no more than a few minutes it's completely dark.
Continuity mistake: During the police chase there are flashing blue lights visible on Chin and Kono's faces during the interior shots, but from the outside of the car only the flashers in the grille are working.
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.
Continuity mistake: When McGarrett is behind the curtain, preparing for the charity fight. McGarrett and the injured fighter, Victor Boriero, share a joke about the dislocated shoulder. Boriero stands behind Lori. McGarrett says "Besides, I'm the one who dislocated your shoulder." Lori giggles, turns to share the joke with Boriero. Boriero says "Yeah, I didn't forget." Lori turns back to face McGarrett (camera shot from behind), and in the next camera shot (camera shot from in front) she turns back to face McGarrett again. (00:37:50)
Continuity mistake: When Steve and Danny go to Dr. Yang's office and find evidence of a struggle, they follow a blood trail out the back door. Danny starts to put gloves on as he stoops down to pick up a wallet on the ground. He only has one glove on before the camera angle switches to the view from behind him, then suddenly he's wearing gloves on both hands as he reaches for the wallet.
Continuity mistake: When the teenagers look up at Emily's window, it's half open. When they climb to it, it's completely open. When McGarrett arrives, the window is half open again. (00:05:00)
Pa Make Loa - S2-E21
Continuity mistake: When he picks up the NCIS agents at the airfield, Danny drives his car up behind the plane and parks very close to it. As the three go back to his car however, it is parked at least fifty meters away and parallel to the plane.
Continuity mistake: At the scattering of Malia's ashes at sea, Steve takes off his lei and in the next shot he takes it off again.
Continuity mistake: At the beginning of the episode, when Grace Tilwell gets out of the Ford Taurus, she closes the driver's side car door. But once the shots change, the door is still open and she walks around the door towards the building.
Continuity mistake: Steve is talking to a female suspect. In one shot, her hair is off her face and the light source is strong from the left. Next shot, her hair is almost covering her right eye and the light is more diffuse and not as strong.
Continuity mistake: Steve and Danny are talking to a murder suspect. She steps out of her office holding a folder in her hand. Shots alternate between her holding the folder and having her arms crossed.
Continuity mistake: Danny is taking to some Victoria's Secret models on the beach. They ask to see photos of his daughter. He is talking to them and he pulls out his cell phone from his pants pocket. Next shot, you see him reach for his pocket again and once again he pulls out his phone.
Continuity mistake: Steve and Danny are searching a suspect's house. Danny picks up a digital camera. He is going through some photos and the LCD display shows 53 photos on the memory card. The counter shows from 53/54 to 50/54. Then he shows Steve other photos and the counter shows only 4 photos. 1/4, 2/4 and 3/4.
Aloha Ke Kahi I Ke Kahi - S4-E1
Continuity mistake: Danny and Steve are talking in the car. In some shots you can see the car's door lock pin is up and in some it is down.
Continuity mistake: A Texas Ranger spreads peanut butter on a suspect in a sugar cane field. The suspect is tied up on the ground and mostly on lying his back and right side. He spreads the peanut butter on his left arm, head and chest. In a later scene, the suspect is taking a shower and you see lots of peanut butter on his back, both his arms and the back of his head.
Continuity mistake: The deceased was supposed to have a one-way ticket to Los Angeles but when they show the ticket, it is one way from LA to Honolulu.
Continuity mistake: When Kono shoots the bad guy who then falls off the balcony and lands on the hood of a truck, his head is toward the front of the truck. Later when they bring out the female leader of the gang the guy is lying across the hood.
Ho'oma'ike - S5-E6
Continuity mistake: Mr. Weiss is in the hospital talking with Chin, Kono and Lou with bandages covering both ears that were supposedly chopped off by Sam Cole During the conversation we see the bandages change to above his right ear showing his ear is fine. Next the shot shows bandages are covering both ears, then the shot switches again with bandages above his right ear, then back to covering both ears. (00:31:22)
Continuity mistake: After the gunmen exit the gallery hiding amongst the hostages, during the gunfire multiple bullet holes are made on the back doors of the ambulance, but all those bullet holes have vanished a few shots later,.
Chosen answer: They are Junior's SEAL buddies.