Captain Mountjoy

Captain Mountjoy is a non-canonical character who was created for the adaptation of In a Glass Darkly, the second episode of the Thames Television series The Agatha Christie Hour. He is an English military officer and a colleague of Matthew Armitage who was also serving as a captain on the western front during World War 1.

Mountjoy was played in the film by David Cook. This character does not exist in the original story.