Continuity mistake: At a meeting to do with the hospital's dealings, one man, Mr Broadbeck, objects to the Elephant Man being a patient in the hospital - in the beginning he is wearing spectacles, but, a few seconds later, the spectacles are gone.
Continuity mistake: When Blackthorne tries to open the door in order to leave the room he woke up in, his hand tears the paper wall. The damage to the paper then changes between shots. (00:11:20)