Norma Desmond got the last Blues Clues right. The wonderful and the beautiful Diana Rigg was the English bobby with a mustache. This look comes from a scene in the film Theatre of Blood.
It's not the only disguise Diana had in the film.
Theatre of Blood is a great film that starred Vincent Price as Edward Lionheart who decides to take revenge on the critics who ruined his acting career. Diana Rigg played his daughter Edwina who helps him in his plans of revenge in a multitude of disguises.
Since Edward Lionheart was a Shakespearean actor, all of the murders are inspired by the plays of William Shakespeare. If you haven't seen the film, don't look at these last two photos. Go see it first. I'll review the film another time, plus there will definitely be a post on Diana Rigg and The Avengers in the near future.