Check out these fascinating documentaries about the Gnostic origins of Christianity and the Lost Gospels that were suppressed by the early church but later discovered during archaeological excavations. They contain alternate versions of the life of Jesus and his teachings which resemble Eastern spirituality. Historians and scholars in these documentaries discuss the implications of all this, why they were banned from the orthodox Christian canon, and what Christianity might have become had they been included.
History Channel - The Lost Gospels
Gnostic Origins of Christianity
If you want to see something really out there and esoteric, then this one is for you. It's called "Sex - The Secret Gate to Eden" and contains Gnostic teachings about how sexual union leads to transformation and communion with God. It's really out there and gets into deep mysticism. I'm not sure I understand it. But it will stretch your mind.
Sex - The Secret Gate to Eden