Colonel Mustard: Wadsworth, am I right in thinking that there is nobody else in this house?
Wadsworth: Um, no.
Colonel Mustard: Then there is somebody else in the house?
Wadsworth: No, sorry. I said no meaning yes.
Colonel Mustard: No meaning yes? Look, I want a straight answer, is there someone else or isn't there, yes or no?
Colonel Mustard: No, there is? Or no, there isn't?
When Mrs. Peacock turns on the cellar lights, a piece of lighting equipment is visible to the left of the screen.
Professor Plum reveals that he works for UNO, the United Nations Organization, in a branch called WHO, the World Health Organization. As such, he works for UNOWHO (You Know Who).