Jean G

Little Girl Blue - S5-E20

Revealing mistake: During the bunker siege, footage recycled from an earlier episode creates the sudden appearance of a white station wagon parked beside the police cruisers that isn't there in all the other shots. (00:41:40)

Jean G

Fools Die Twice - S5-E6

Revealing mistake: A loud, fierce gun battle rages between dozens of 5-0 sharpshooters, Army MPs and the desperadoes inside the payroll office. Amidst all the high-powered rifle fire, a woman in a blue dress strolls casually by in the background, well within bullet range, and never even turns her head to see what all the ruckus is about. Gee, you'd think colossal shooting wars broke out on her block every day. (00:13:30)

Jean G

You Don't Have To Kill To Get Rich -- But It Helps. - S5-E3

Revealing mistake: We see the body of Karen Bell 30 fathoms underwater, with her feet tied to a concrete block. But just before the shot cuts, the "corpse" wiggles its toes.

Jean G

Cloth of Gold - S4-E20

Revealing mistake: Near the end, McGarrett's boat is preceded by the wake of another boat that isn't there when the angle of the shot reverses. The wake belongs to the vessel carrying the camera crew. (00:46:45)

Jean G

Cloth of Gold - S4-E20

Revealing mistake: When the underwater camera breaks the surface in what is supposed to be open ocean, the domed roof of a Hawaiian aquatic theme park building is visible in the background.

Jean G

Highest Castle, Deepest Grave - S4-E1

Revealing mistake: Stock footage turns the doctor's black 1970 Lincoln Continental into a 1950s model when it goes over the cliff, crashes and burns. (00:15:50)

Jean G

Paniolo - S3-E15

Revealing mistake: When McGarrett and the modern-day posse find Frank's euthanized horse, the "dead" animal is quite visibly (and vigorously) breathing. (00:45:20)

Jean G

Beautiful Screamer - S3-E12

Revealing mistake: When Sally is driving the blue station wagon full of singing kids, several light reflections on the side of the car never move at all, revealing that it's really a stationary mock-up sitting on a soundstage. (00:42:30)

Jean G

Forty Feet High and It Kills! - S2-E3

Revealing mistake: McGarrett and Victoria watch surfers from the beach. Thanks to the insertion of stock footage, they "see" surfers riding huge 6-foot waves. But in the shots of the actual locale behind them, the ocean is virtually flat. (00:09:30)

Jean G

Murder is a Taxing Affair - S6-E6

Revealing mistake: A bad matte superimposed over Cavel's rearview mirror makes McGarrett and Danno, who are actually in a car behind him, appear to be sitting in his back seat instead.

Jean G

Season 8 generally

Revealing mistake: 8-5 "Death's Name is Sam": The plane hit by the missile is a little too obviously a still photo with the explosion superimposed over it.

Jean G

The Ransom - S3-E6

Revealing mistake: McGarrett paces in his office, and when the shot cuts to a close-up of his feet, the actor's blocking mark is visible, chalked on the carpet.

Jean G

Death with Father - S6-E19

Revealing mistake: The teaser contains footage of a stunt-gone-wrong. The getaway truck smashes into a mock-up police cruiser that has been secured with a chain to pull it back out of the shot. The chain breaks, and is visible trailing from the bumper as the fake cruiser starts an unplanned roll down the hill. (It went on to collide with and damage two real HPD patrol cars rented for the production).

Jean G

You Don't Have To Kill To Get Rich -- But It Helps. - S5-E3

Revealing mistake: When the shot pans to its feet, the dead body floating in the water can be seen to wiggle its toes.

Jean G

Full Fathom Five - S1-E3

Revealing mistake: McGarrett's office is on the 2nd floor. Yet the photo backdrops outside his windows in this episode show us a ground-level view of grass, streets and a building. This boo-boo vanishes in subsequent episodes, replaced with the more likely views of balconies, palm trees and blue sky. (00:08:00)

Jean G