Thanks to Sl-Lost for the heads up on this snippet from Carlton about the Season 6 Finale and the fact that it will be 3hrs, split over 2 weeks.
Will 18 hours be enough for the last season? (By the way, Season 6 will consist of a two-hour season premiere, 13 episodes and three-hour series finale that will air over two weeks -- but as Cuse joked, "I’m sure the network will sell it as a six-part finale if they can.") Cuse: "For us, [18 hours] is just about right. I mean, we aren’t sitting here feeling like, 'Oh my God, we need a ton more hours to tell the rest of our story.' It feels like it’s going to work out just fine. It will have been the right length."
Source: Full Interview @ chicagotribune