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One of the Companions of the Fourth and Fifth Doctors. She was Tremas of Traken's daughter.

Nyssa of Traken was a quiet, studious girl who was highly intelligent, and often able to talk to the Doctor on almost his own level. However, she had been brought up in a very secure and tranquil environment, and often found the Doctor's universe too violent and foreboding.

She helped the Fourth Doctor defeat the Master on Traken, then went in search of her father, whose body had been taken over by the Renegade Time Lord (5T).

She followed the avatar of the Doctor, known as the Watcher, to Logopolis, then Earth, where she watched the Fourth Doctor regenerate.

She then helped the Fifth Doctor fight the Master, Monarch, the Mara and the Terileptils. During a visit at Cranleigh Halt, she discovered she was a perfect double for Ann Talbot, Charles Cranleigh's fiancee (6A). Alongside the Fifth Doctor and Tegan, she fought the Cybermen, the Master again (disguised as Kalid), Omega, the Mara again, and Mawdryn.

Finally, she found her calling when she chose to remain on Terminus to synthesize hydromel and help the victims of Lazar's disease a condition similar to Leprosy (6G).

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Sarah Sutton was born on 12 December 1961 the daughter of an airline pilot. Sarah began her acting career at the age of nine when, while attending the Elm Hurst Ballet School, she was picked to play the part of 'Baby Roo' in a Phoenix Theatre production of "Winnie the Pooh", which she went on to repeat for three christmas seasons.

By the age of eleven she had landed a number of TV roles, including "Menace: Boys and Girls Come Out to Play" (1973). She then went on to play 'Myra Longmore' in the TV mini-series "Late Call" (1974) 'Alice' in "Alice Through the Looking Glass" (1974), "Oil Strike North" (1975), and"Casualty" (1986) playing 'Sarah Dryden'in the episode"Charity".

Her biggest success came when she won the lead in the children's TV drama serial "The Moon Stallion" (1978) written by Brian Hayles. She went back to her acting studies at the Guidhall School of Music and Drama as a part-time student.

It was shortly after taking a Caribbean holiday that she was called in to audition for the part of Nyssa in "Doctor Who", initally for one story, and was delighted when her character was kept on as a reguler companion

Following her stint on the series she returned to theatre work, touring in the play "Policy for Murder" (1986). She subsequently got married and had a baby daughter, Hannah, which contributed to her taking a break from acting.

She reprised the role of Nyssa in "Doctor Who Dimensions In Time" (1993). She did however win a small role in the TV play "Unnatural Pursuits", and appeared as herself in the video "Lust in Space" (1998).

She hopes to return to full-time acting when her daughter is older.

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