kalirion: Actually IIRC, if you listen to the commentary of Blackwell Legacy, Dave Gilbert says that he started on the Blackwell series because he wanted to get into episodic games.
Leroux: I think the first three games of the Blackwell series are a good example of episodic games done right. I'm not a big fan of episodic games myself (although I enjoyed Sam & Max Season One, but I bought it as a complete package). Especially not when there's a chance that they will be abandoned before the story arc is closed. But like I said, I think the first three Blackwell Bundle games work fine even on their own. I'm a bit more wary of games with numbers in the title, like Insecticide Episode 1 (the sequel of which was indeed abandoned on PC), Lylian Episode 1 or The Journey Down Chapter One.
Don't forget the Half-life 2 Episodes. >.>