Continuity mistake: When the guy is in the mountains he burns some of the triffids at the fence and you can clearly see them frying. But when the camera pans across the garden later, there are still triffids, but they are all fire-free and there are no bodies.
Continuity mistake: In the scene where they ride to the top of a hill on horseback, you can see a white van and power lines in the distance.
Continuity mistake: After Dr. Cortner finds Kurt dead in the laboratory, he pulls his neck tie and it loosens, hanging down. In the next close view the neck tie is shown neatly tied back again, and is then back to hanging loosely.
Continuity mistake: Sakurai is having a steak dinner at home; in the close-up of the two steaks and fries, one of the men is holding a beer glass with their right hand, but it's not the case in the next shot. (00:07:40)
Continuity mistake: As Harry stands at the side of the traffic-filled back road, shots of panicked people fleeing down the two lane highway are used to convey the desperation of folks' attempts to flee the coast, except the shots used show four lanes of an eight-lane freeway.