Continuity mistake: When John baptizes Jesus, Jesus' hair is dripping water onto his shoulders as seen from the front. As seen from the back, there's no dripping at all.
Factual error: Many of the panoramic scenes in this film capture breathtaking views of mountain ranges completely covered with snow - a geographical feature not to be found in the Holy Land. It is found on occasion, though, in Arizona, where these sequences were actually shot. Other scenes show desert bluffs, mesas and arches that are also not found in the Middle East: they're the distinctive formations of the Arches National Park in Utah, USA.
Revealing mistake: At the very end, a violent storm engulfs Jerusalem and the people viewing the crucifixion. In the close ups, you can see rain falling, but no one appears to be getting wet.
For his role as Pontius Pilate, Telly Savalas shaved his head bald. He would keep the look for the rest of his life, and it would become his most identifiable feature.
This was the last film to be partially shot in Cinerama, a technique that was abandoned due to cost issues. On studio orders, director George Stevens had to re-shoot large portions of this movie in 70mm instead, causing delays that created huge cost overruns, and a two-year delay in releasing the film.