During the Via Dolorosa where Jesus is carrying His cross and later after He's on the cross, Jeffrey Hunter's fake beard and nose are starting to slip off. In close ups of Jesus on the cross later in the scenes, Hunter's fake beard and nose are corrected.
When the crown of thorns is placed on Jesus' head. In the next shot, Jesus has a broken piece of pottery on his head as well.
When Mary Magdelene is speaking with the Virgin Mary at the doorway, she changes position every time the camera angle changes. Every time the camera is at Magdelene's back looking into the house, she is leaning against the door frame but every time the camera is in the house facing Magdelene, she is suddenly standing straight.
Jesus is shown to be scourged in the front and back but later scenes, there's not a single scratch at his front.
Two boys arrive running when Jesus is healing a paralyzed man and then change places several times between shots.
The wife of Pontius Pilate calls the Emperor Tiberius her father, but in history no daughter or stepdaughter of Tiberius has been married to Pontius Pilate.
Pontius Pilate is addressed as "governor," however, he was not a governor but was instead a prefect. Judea was a component of the Roman Province of Syria whose governor resided in Damascus.
At the Last Supper, Jesus offers the apostles pieces of bread. The Last Supper is often regarded as a Jewish "seder", the traditional dinner commemorating the fleeing of the Jews from Egypt with Moses. As such, and keeping with tradition, the only "bread" present should have been unleavened bread (matzoh), but the bread that is given is obviously leavened bread.
When the dying Herod is crawling up the steps toward his son sitting on the throne, the thumping sound of his hands and knees on the steps reveal that they are made of wood and not the marble they appear to be.
At the Sermon on the Mount scene, several in the crowd are making the sign of the cross. This particular form of the sign of the cross developed in early Christianity sometime later.
As the Roman line advances through the mob, many people fall down dead without even being touched by a Roman weapon.
As the Romans enter the city, the tops of their spears flap back and forth because they are made of rubber.
When the Jews are storming the fortress, several are scaling a tower towards some Roman soldiers who fire arrows down at them. The arrow of the soldier on the left flies backwards out of his hands and he bends over to retrieve it.
During the scene where Barabbas is escaping from the Romans after he has ambushed them, he is alerted to their presence behind them by an arrow skipping off the rock just over his shoulder. The shadow of the person off-screen who "throws" the arrow is plainly visible.
The killing of the newborns in Bethlehem is carried out by Roman soldiers. In reality the Roman Army had no units stationed in Judea until AD6, two years after Herod the Great's death (when it became a full province of the Roman Empire rather than a client kingdom). Instead, the massacre would have been carried out by Herod's own troops, who were a mixture of Jews, Samaritans and foreign mercenaries.
Near the end of the temptation of Christ by Satan scene, 2 power line poles can clearly be seen in 2 shots, in the upper right rear of a long shot of the desert and canyons.
At the temple at the beginning of the film, a Star of David can be seen on the temple. The Star of David didn't become a symbol of Judaism until the Middle Ages, in Europe.
Mary Magdalene's vaccination mark on her left arm is clearly visible in the stoning sequence.
When Jesus is teaching people how to pray with the Lord's Prayer, it is said with the doxology at the end (for thine is the kingdom, etc.). The doxology was not part of the original prayer but was added at a later time.
When Lucius is reading a scroll of Jesus' activities for Herod, Pilate, and others, he recounts the feeding of 5000 with two fish and five loaves of bread. The actor originally said "five" fish which was later corrected by voiceover so that the audience hears "two" on the soundtrack.
The wire holding up the branch on which Judas is hanging is clearly visible, especially when it appears to fall (as the unseen crew lowers it).
During Jesus' walk through the wilderness, he drops to the ground to suck water out of a cactus (prickly pear). Cactus is native to North America. Pricky Pears were introduced to the Middle East in the 18th century.
The narrator claims that the three wise men came to Bethlehem from the east. But only Persia was from the east, Mesopotamia was from the north, and Ethiopia was from the south.