"Doctor...Doctor...Doctor...Doctor...Doctor. How many doctors are there on this planet?"
prot asks Powell's wife about a picture of a young man in their home.
Rachel: That's Michael. Mark's son from his first marriage. prot: How many marriages has he had? Rachel: Just the two. So far. prot:so far?
During prot's going-away party, Howie is collecting essays from the patients telling prot why they feel they should be the one he takes back to K-PAX. Then one of the hospital staff hands one in and backs away with a shrug.
Later, the same staff member is guarding prot's door overnight, and when another staff member passes by they make an on-the-spot bet on if prot is actually going to leave or not.