The episodic Back To The Future game from developer Telltale Games is still prepping for the first episode's release sometime later in December. This week the game's official web site got a major update with quick synopses of all of the game's five chapters (obviously there are some spoilers for those of you who want to play the game cold).

There's also some new designs for some of the game's characters including confirmation that one of the movie's greatest villains, Biff Tannen, will be showing up to make Marty and Doc's life hard. Unfortunately it looks like Tom Wilson, who played the role (as well as past and future versions) in all three movies won't be handling the voice for the character.