It sounds like a cool idea on paper, at least, but after a few episodes they're going to get old unless they pull some really crazy stuff.
I do think it'd be a cool idea for something like a six part miniseries or something. You know, that's what TV needs to hop on. More miniseries. Do like half a season of some really cool stories. You can get some huge stuff going, but you can also wrap it up and actually write stories that don't have to either last for several years or potientially go on forever.