Revealing mistake: Bond escapes from the buried pipeline when two technicians open a hatch from the outside. One tech unlocks the hatch by rotating a large wheel, which drives the locking mechanism. But when he finally opens the hatch, there's absolutely no mechanism attached. There's just a bare axle that the wheel turns on.
Revealing mistake: In the scene at the stadium where Lisa is helping Neville escape from Mathias' people, it is extremely obvious that in the far shots, it is a stunt man (wearing a very bad grey wig) driving the motorcycle, and Charlton Heston in the close up shots.
Revealing mistake: Throughout the film, when the camera goes close to Zira, you can see the line where her wig is glued on.
Revealing mistake: When the doctors first arrive by helicopter in the town, they're looking around. The Minister lying upside down on the stairs moves his eyes and forehead as if looking to see what's going on, on the set. (00:22:15)