Zienia Merton played Ping-Cho in the Doctor Who serial Marco Polo and the Registrar in The Sarah Jane Adventures story The Wedding of Sarah Jane Smith. This makes her the first actor from the initial season of Doctor Who to appear in a current episode of the franchise.
Merton is best known to science fiction fans for her role as Sandra Benes in the mid-1970s series Space: 1999. She reprised the role for the 1999 short film Message from Moonbase Alpha. Her other television credits includes roles on The Benny Hill Show, Jason King, Return of the Saint, Bergerac, Eastenders, The Bill and Coronation Street.
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