She decided to stay with the Doctor realizing that life with him would be far more fun that her current activities. She was a rather naive young girl, but often showed great courage in the face of danger.
Also, being a very attractive woman, she was lusted after by more aliens and foes than any other Doctor Who companion.
She rapidly formed a close bond with the fifth Doctor, a relationship that was to change completely with his traumatic regeneration into his sixth persona (6S). Peri was often swamped by the bombastic nature of this incarnation, in turns admiring him and being terrified of him.
When the Time
Lords took the Doctor out of time, he was unable to save Peri who was
seemingly captured by a human surgeon who placed an alien brain inside
her body. However, this was most likely a false image placed into the
Time Lord's Matrix by the Valeyard, in order to implicate the Doctor in
Peri's apparent death (7B). Some still believe
that eventually she left the Doctor to marry King Yrcanos on Thoros Beta.
It was also during her time at drama school, that Nicola married the Broadway singer, Scott Kennedy, although they later separated. Her final production at Webber Douglas was "No, No, Nanette", in which she played the lead. She was spotted by an agent, Terry Carney (William Hartnell's Grand-daughter's husband), and asked to audition for the part of Peri in "Doctor Who", which she got.
Nicola joined Doctor Who straight out of drama school - her year in a U.S. school and her ability to do a decent American accent making her a natural for the part of American college student Perpugilliam Brown.
She stayed with the show for two years (although it really was only a little more than one season of episodes, thanks to BBC Chairman, Michael Grade's famous 1985 cancellation).
Since leaving the show, she has spent time on stage, appearing in such productions as "Killing Jessica", "Who's Afraid of Virginia Woolf", "Twelfth Night", "Come on Jeeves", "So Long on Lonely Street', and "The Great Gatsby".
She has appeared in all four "Stranger" videos and in "Black Adder's Christmas Carol"as Black Adder's niece, and "The Airzone Solution" with Colin Baker. In 1992, she went to Los Angeles for several months before returning to the UK. In 1995, she appeared as Martine in "The Biz", a children's series.
She also has sung with Colin Baker, Anthony Ainley, Nicholas Courtney and a number of British pop stars on the "Doctor In Distress" record .
in Notting Hill, England where she still writes music.