The Internet Movie Database, or IMDB, maintains a page for "Downton Abbey" that lists all cast and crew alongside information about the frequency of their appearances, their roles in the show's production and their tenures on the show. This page is similar to the ones maintained for most movies and television programs on IMDB and is frequently updated to reflect changing information.
IMDB updates its information as the show releases new rosters of cast and crew and as casting information is released during the show's production. This means that the information available on the "Downton Abbey" show page is always as current as possible.
In addition to listing the full cast and a great deal of incidental information, the page gives fans of the show a chance to learn who produces, directs and costumes the entire production. This can layer a person's appreciation of the medium as they come to understand the complexity and multileveled effort of getting a show from the script to the airwaves.
IMDB maintains pages for nearly every film and television project that occurs within the mainstream or the Indie televisual circuits. This makes it a deep resource for anyone who wants to know the minutiae underlying their favorite television programs and the processes that bring them to life.