REASON FOR SPECIALS Edit
Specials are monthly episodes that happen in between seasons, if the season ends in the middle of the year, or sometimes are just special episodes, such as "The Last Quest".
THE MOVIE Edit
Doctor Who The Fan Series: The Movie is a 60 minute long feature that aired on Dailymotion, connecting Seasons Three and Four, and finishing The Dalek War Storyline (Special: War of The Daleks). It is considered a special,due to it airing with the Season Three Specials, though it's completely different.
The Running Time of a Special: 38 - 45 minutes per episode
Running Time of The Movie: One Hour
THE ESSENTIAL SPECIALS Edit
The Essential Specials is a playlist created featuring the best of the best specials:
War of The Daleks
The Age of Cybernetics AKA Cyber-Age (Considered one of the darkest episodes)
The Plague Doctor
The Twilight Zone Crossover
The Knight Before Christmas