Not one of my favorite episodes.  I didn't really feel the draw of the "stodgy" 45 year old man falling for an eccentric secretary, even if she flattered him.  I suppose if she was very attractive it could happen, but her voice has never given me that impression (although we all should know how voices rarely seem to match the face, see Rick Astley as an example).  I did find it strange at the end that his wife had been warned by his reflection, but after the shooting seemed not to think about it anymore.