Now we have two episode types: regular episode and special one. I'm not sure, that it's possible to expand this list using existing engine. But if it's possible, there are several other types of episode (okay, this types are subtypes of regular and special, but...). Many shows have "movies", which have been already added at TVMaze, which are indicated as Special, so I think we need a type for them named "Movie" or similar. Another my suggestion for type is "Missing episode", which is regular one (with season and number), but it doesn't exist now. This problem is actual for 60s-70s shows, mostly British. Commonly known show with missing episodes is classic Doctor Who, but there are plenty of them, for example Avengers.

