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No. She is in the past and it is believed that it should be left that way. There has been no indication of a return of Nimueh since her death in the finale of Series 1.

NEVER. Except in a reboot should they make one.0x35pxink=User:Dryuuu 15:28, October 1, 2012 (UTC)Dryuuu

Answer 2: It remains unknown as of yet whether Nimueh will return or not :)