Knife Edge References Knife Edge film by Hickox [2009] Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Joan Plowright/ Film and TV…a cameo in the thriller Knife Edge (2009), which was her last feature film. She subsequently retired from acting because of macular degeneration, which ultimately led to a loss of eyesight. Read More…a cameo in the thriller Knife Edge (2009), which was her last feature film. She subsequently retired from acting because of macular degeneration, which ultimately led to a loss of eyesight. Read More