Roz was born in 2935 to an aristocratic family. With her Adjudicator partner Chris Cwej, Roz was on the police force of 30th century Earth, at that time divided into the Overcity and the Undercity. Chris and she were investigating a murder case in Undercity in 2975 when they encountered the Seventh Doctor and Bernice Summerfield. They helped the Doctor defeat his old enemy Tobias Vaughn. (PROSE: Original Sin) Roz and Chris joined the Doctor and Bernice after seeing the corruption and manipulation rife on Earth in their time.