Nancy Drew is a mystery because of the way she reacts. You never know what she is going to do next. That is why I think Nancy Drew is a mystery.

Yes, Danny Glover did appear in Fallen Angels. He appears in the 1995 episode "Red Wind".
He played the role of Phillip Marlowe.

Hardy. Boys. And. Nancy Drew

she is a teen detective that solves mysteries! Nancy Drew is the main character of the Nancy Drew mystery stories, Nancy Drew on Campus books, and Nancy Drew Files books.

There was not only a Nancy Drew TV show, but a Hardy Boys show too. Nancy Drew, until later in Season 2 of the show, was played by Pamela Sue Martin. Nancy Drew was later played by Jannet Julian. The show aired from 1977-1979. For more info on both shows, see http://www.imdb.com/title/tt0075513/ . Its a pretty good show. My personal favorite episodes (that I've seen) are "Mystery of the Ghostwriter's Cruise" and the two-parter "The Mystery of the Hollywood Phantom". Hope this helped :)