If I remember correctly, TSL was originally supposed to be 3 games, with 3 chapters each, for a total of 9 chapters. Due to the lack of a budget, (I believe) it was stated that Chapters 1 and 2 were the only parts which would be released, so Episodes 1-5 take up Chapters 1&2.
Two questions: Will any elements from Chapters 3 through 9 find their way into Episode 5?
And after TSL is finished, do you guys think you might release the full original nine chapter script for the fans to enjoy?