Because the title "Ghosts" is used for two popular different sitcoms (the original UK version and the US remake), details for both are provided below to ensure you find what you are looking for.
If you are testing your knowledge on the show, here is a question regarding the first season: ghosts s01e02 dvd5
Today, searching for "ghosts s01e02 dvd5" yields nothing official. But in private data hoarding circles, it's a secret handshake — proof you've found the raw, unremastered, original broadcast version, complete with the continuity announcer talking over the end credits and the original BBC DOG (digital on-screen graphic). No menus, no extras. Just a ghost of the episode as it was first seen. Because the title "Ghosts" is used for two