Continuity mistake: When the load of lumber is dropped on Captain Greer's 1968 Ford Galaxy 500, the car turns into a beat-up 1960 Oldsmobile just before it is squashed.
Continuity mistake: 9-4 "Man on Fire": McGarrett's blackboard already lists plutonium as the poison source before Dr. Ormsbee enters to inform him that plutonium was the poison source.
Continuity mistake: When the second bottle thrown by Pike lands on the floor, the glass from the first bottle has all disappeared.
The Baranoff Timetable - S2-E21
Continuity mistake: Ortega takes Mundy's shoes (with lock picks hidden in the heels) and locks him up. Mundy soon has the confiscated shoes back on again, though, even before he escapes the cell. (00:40:00)
Continuity mistake: The unit says 1w20 then later says 1w30. (00:25:40 - 00:26:40)
The Incomparable Connie Walker - S1-E18
Continuity mistake: "The Incomparable Connie Walker": When Dillon visits Mayor Walker's house, Walker's red carnation is on his left lapel. But one shot of him is, for some reason, reversed, causing the carnation to switch itself to his right lapel for a moment.
Continuity mistake: Just before they leave for the meeting at Lottie's Place, Jason places a hand on Jeremy's shoulder. When the shot cuts, his hand jumps to a much lower position on Jeremy's forearm. (00:41:05)
Aunt Bee's Cruise: Part 2 - S1-E16
Continuity mistake: Aunt Bee and Captain Wolford are sitting on the porch. The Captain extends his left arm behind Bee's head and rests his hand on her shoulder. In the close-up of Bee, there is no hand on her shoulder. In the following shot, the Captain's left hand is in his lap.
Continuity mistake: The hole in the crate changes size and shape from when the Spindrift crew enters it to when the giant moves the crate.