Mr. McElroy is or rather was the History Teacher at Xanadu. Highly enthusiastic about Egyptology, Mr. McElroy had made his class all about Egypt. He loved Egyptology so much that it caused complications for tests and exams which had questions about things other than Egypt. His career ended when he came under the impression that he was Tutankhamun and thus sent to an asylum in Australia of all places.

Mr. McElroy makes his debut in the seventh chapter of Stranger and Stranger. One of the zombified former staff members of Xanadu, he appears dressed in a period costume making one think of Ancient Egypt. He appears alongside a fellow former history teacher to carry an unconscious Basil Hagen of stage.