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The cast of Merlin say they want show to end on a high

5 October 2012 Last updated at 07:05 BST

Merlin star Bradley James says that he would like the fantasy series to go out on a high when it does end.

The actor joined co-star Angel Coulby to talk to Newsbeat about the show's increased ambition and darker tone of the fifth series.

The new series of Merlin begins on 6 October on BBC One.