User blog comment:123Action/Calm down everyone!/@comment-4190137-20120910064534

Andy has been on the set of Merlin since 2010, in my opinion he is a reliable source for this sort of information. He also said, "we were told Series 5 is the last". So unless he is being a rat and trying for Series 6 to be a surprise... I'd say Series 5 will be the last. But I guess it wouldn't seem so unwise to predict that the guy is BS-ing as actors/producers/crew have been known to do this in the past. But the odds are against it by the looks of it.

Source:

http://gealach-ros.livejournal.com/823273.html

I think the best thing we can do at this stage is prepare to consider planning a petition for a Series 6. We can't just sulk about this or let what we want influence our predictions, we need to do something about this before it's too late!