In the scene where Jesus is destroying the temple you will see the actor who plays Peter 3 times!
They are all very noticable. The first is toward the beginning where he plays a phony doctor and is holding a fake arm and the others are in front on the screen where he walks in front of the camera.
That really isn't so bad...low budget films often do that. Like in the movie "Clerks" the same man plays the egg guy, the Chewlies gum guy and a few other characters.
ldybrdway, the reason that I added this one is because it is all in the SAME scene. Most movies do not have characters be in the same scene, (like the director appears in two different scenes in Sixth Sense.) Beside, Jesus Christ Superstar was a UNIVERSAL film in the 70s. Universal gave Norman Jewison a large sum to make this film. This was not a low-budget film.
It was a film of the stage production in which a limited amount of performers are used. It's supposed to be that way, i went to see it in London and the performers all double up quite a lot. I don't think it had the desired effect but still, it was intentional.
garethgazz hit it dead on. It's a musical troupe performing in the desert. With only a certain amount of people there, they're obviously going to have to take on multiple roles. If you look at the scene where Jesus is presented to Herod, a majority of the disciples are in Herod's entourage. You can obviously spot Pilate for one...