The unique basis of the character allowed Mary to play the role very much of that as an equal to the title character, where as before many previous actresses had been simply seen as assistants. Graham Williams very much wanted Romana to be seen as an Ice Maiden figure, but Mary was still able to inject plenty of warmth and charm into the role.

Mary made the decision to move on from the show after her first year, and has since gone to to continued success on television and in particular, British theatre, where she remains exetremely popular and much in demand.

In all, Mary's time on the show consisted of a total of six serials, which were:

The Ribos Operation
The Pirate Planet
The Stones of Blood
The Androids of Tara
The Power of Kroll
The Armageddon Factor

This season is available as a Region One DVD Boxset release in the USA. Currently there is no news regarding a Region Two (UK) or Region Four (Australia) release as yet.