Was the encounter with Raizel an illusion or was the carousing at the wedding-hall illusory? Was Dr. Margolin the victim of the accident and was his astral body hovering in the world of twilight?

The carousing at the wedding-hall was illusionary. Raizel herself has been dead for long and her encounter with Dr. Margolin was because of his own death. He was the victim of the accident and his astral body was hovering in the world of twilight. Both were missing a physical dimension, and in fact, were spirits.