Continuity: In the beginning of the boat chase two bullets hit the windscreen of Indy's boat. In the next shot the location of the holes has changed.

Continuity: While in the Germans tank, the right side of Marcus's jacket is bent and wrinkled. A Frame later it looks perfect.

Continuity: On the tank a soldier jumps from Indy's right to attack him. The following angle shows the soldier coming from the front.

Continuity: While the German tank travels to the temple, it passes a German soldier. Inmediately after, a very wide angle shows the soldier has dissapeared.

Continuity: While Indy and his father are talking in the zeppelin, the amount of flowers in the vase keeps changing between shots.

Continuity: In the scene in the temple after the two soldiers attempt to get past the first task, the first soldier is seen on his back holding his head beside him. When Indy attempts the first task, both dead soldiers are on their stomachs with no heads in sight.

Continuity: When Indy is looking up at the front of the Grail temple it is bathed in direct sunlight. Indy dismounts his horse in the shadow. However, in the shot just before dismounting, the cliffs behind Indy are also bathed in direct sunlight. That is impossible.

Continuity: When Young Indy is hoisted from the lion's carriage on the train, one of the baddies is holding a gun at him, in the next shot, the gun is down by his waist.

Continuity: When we first see the knight guarding the Grail, his cloak is tied off with a braided rope, which hangs down on his right side. It stays this way until he says "You have chosen wisely," where the rope has somehow shifted to his left side. The rope goes back to normal when the knight waves goodbye at the end of the movie.

Factual error: During the motor boat chase through the canals of Venice, Dr. Schneider pilots the vessel between two ships, one identified as the John W. Mackay of London. Although the Mackay was commissioned in 1922, it was stationed at Halifax, Nova Scotia for service in the North Atlantic. It was deployed for the first time to the Mediterranean in 1942 - four years after the purported time of the movie.

Revealing: When Indy is looking out at the gorge in front of him after spelling out God's name, there's a shot where he looks at the lion's head above him. You can see him from down the corridor, and you can notice as he touches the wall, it moves, showing it is a fake wall.

Continuity: When Indy and his father are being pursued by German soldiers on bikes, right after they break through the barrier, the barrier guard comes out of his post and waves the pursuing German soldiers to slow down in the background. In the next shot he's no longer there, and the barrier's quite far away, then in the following shot he's back, and Indy's not so far from the barrier again.

Continuity: In the scene where Indy & the protector of the Grail are in the boat about to be destroyed by the rotors, there are panels on the top of the boat that pop up and are destroyed when the boat is moving backwards into the rotors. In the next shot, they are intact, then in the next shot, they are destroyed again.

Factual error: Jehovah is spelled Iehovah in Latin. However medieval languages (Latin or vernacular) had neither official rules nor the letter 'J'. It was not until the sixteenth century that the French humanist Pierre de la Ramée proposed to use the 'J' as a separate letter distinct from the 'I'. The 'J' could therefore not have been a trap at the time the test was constructed.

Continuity: Indy and co. leave their horses a way from the steps to the temple, but when we cut to a closer shot they're very close to the entrance.

Factual error: German Fighters shown in the film are in fact Pilatus P-2 (Swiss-made aircraft built after World War II). The appropriate fighter of the period would be the Messerschmitt 109.

Continuity: The sky colour/condition changes between the shots of Indy and his father in line to get on board the Zeppelin and the scene just before. In one, it is cloudy, and in the other it is a clear blue.

Continuity: When Marcus is taken to the temple by the Germans, the knot on his tie differs between a far shot and a close one.

Continuity: In the Grail temple, when Sala says "Drop your guns please," he is holding a rifle. When Indy instructs his father a few seconds later to get up, Sala is not holding a rifle but has his hands crossed.

Factual error: In the motorbike chase after the rescue of Indy's dad from the castle, you can see how they pass the border between Austria and Germany. The guardhouse is waving the Austrian flag. Austria however ceased to exist as a sovereign state after the annexation by Germany in March 1938. Looking at the weather it rather seems to be spring than winter. Therefore there would no longer be a guard at the border nor a guard house waving the Austrian flag.