Caul's Name

Caul is actually the term for a transparent fetal membrane that is present at birth. The original name was supposed to be Call, but since there was a typo, the directors and writers decided to keep the name Caul and integrate it into the film.

The name is worked into the film in several ways. First, Harry wears a transparent rain coat over all his clothes. Most people only wear rain coats when it's raining, but Harry seems to wear his all the time. Along with many of his other quirks, he seems to be obsessive about wearing the jacket.

Also, when Harry confronts enemies, such as Bernie and Martin, he sometimes talks to them through transparent barriers. Unlike Harry, these things are transparent. Harry, on the other hand, does his very best to cover up who he is and how he does his work.

The Conversation