"Doctor Who" fans will recognize this week's guest star on "Merlin," Lindsay Duncan, who played Adelaide Brooke opposite David Tennant in "The Waters of Mars."
In the "His Father's Son" episode of "Merlin," airing at 9 p.m. Feb. 3 on Syfy, Duncan portrays Queen Annis, ruler of the Castle of Fyrien, who becomes so bitterly angry at King Arthur that she schemes with Morgana to defeat him and claim Camelot.
The acclaimed stage actress earned a Tony Award and a Drama Desk award from her Broadway performance in the revival of "Private Lives." She was nominated in the same category in 1987 for "Les Liaisons Dangereuses."
"We were lucky to get her," "Merlin" executive producer and series co-creator Johnny Capps said. "We wanted an actress who could give the character a real heady weight of authority, and her performance is absolutely brilliant. This is a character that will definitely be returning.
"Lindsay brings this real gravitas to the episode, so the world has more at stake and feels more real and allows (the viewers) to realize that there are others kings and queens in this fantasy world--and that there are repercussions for people's actions."
Queen Annis is led down her destructive path after Arthur makes his first difficult and possibly deadly decision as king--with the questionable guidance of Agravaine. Yet the decision Arthur makes proves to be an important step on his path to being an even greater ruler than his father.