Howling:Is The Doctor human? Is The Master, The Doctors brother?

For this please head over to Paul McGann's Audition tape. http://youtu.be/56h_JuBZ9_0

I want to know if this is a fake script? or was this something they were planning or a script from some book/audio book i didn't hear?

perhaps It's just a script that they made up for the audition. But still.. it makes me wonder.