I saw that documentary on Apr. 9th, this last spring.
I was curious over a few facts/suggestions the National Geographic Channel offered in their movie, so I sent off a letter to them at
lostgospel@ngs.org.
"There were some interesting theories put forth tonight in
your program concerning the Gospel of Judas. I am intrigued, however, that
no mention of who the possible author of this Gospel was. It was supposed to have been a Gnostic author, but who was it?
Who would have written the Gospel? How would they have even known what was purported to have been told to Judas by Jesus, or when it was supposed to have been done?
In the testimony I saw tonight in the Gospel of Judas, as soon as he realized the outcome, and the magnitude of his deed(s), he went and did away with himself, and there, by your own account, that is where the story ends.
The Gospel does not contain an account of the Crucifixion,
thereby, in my opinion, validating the idea that Judas did in fact commit
suicide in very short order, after that night when he gave Jesus up to the
Roman guards.
By all accounts, even in the other Four Gospels, Judas did
exactly that - he killed himself. There is no mention of him ever recounting
his thoughts to another individual, be it a Disciple, or Roman, or a
Sadducee, or any other Jewish authority.
So, I ask again, who would have had knowledge of what Jesus
was to have supposed to have told Judas, and then sat down and scribed a
interesting but somewhat incomplete document?"
The only answer I got from them was to the point that "they had received many replies/requests concerning this documentary, and were unable to answer my letter at this time."
They never did any follow up to that reply.