One thing that bugged me: I believed that the mystical crewmember said "decorporation" to describe his journey. The usage made no sense, although it could have been a means by the writers to make fun of his cliched spiritualism. (Or maybe I misheard.)
I think you misheard. Consider...
materialize/de-materilize
sensitize/de-sensitize
contaminate/de-contaminate
corporeal/...
cor·po·re·al
relating to a person's body, especially as opposed to their spirit.
having a body.