May not be the last series - Kevin wants the summer off as he says he's worked every summer for 30 years. But he has not ruled out returning in 2014 and says the story line has been left open.But I think chopping it up into hour-long episodes may mark the demise of Lewis. But don't forget ITV have Endeavour on the cards as well.
They could also have a break for a few years and then start a new series with Hathaway as the lead detective with a Lewis-like sidekick.
Don't forget the game we played during the last season ie finding alliterative nicknames for the various bits of stuff that turned up