Board Thread:General Discussion/@comment-4190137-20120911075800/@comment-5234528-20120913151201

MerlinNimueh wrote: But if the Series 5 finale has already been made we would have fought for nothing

Very often they make two ends of a series. And if they see that the series is very populair they don't let the series end. Or with Merlin: if BBC agrees with a 6th series the don't let it end and if they doesn't the show another finall.