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: The unit says 1w20 then later says 1w30. (00:25:40 - 00:26:40)