Nia Roberts

Nia Roberts (born 5 July 1972 ) played Ambrose Northover in the Doctor Who stories The Hungry Earth and Cold War.

She also voiced several characters for Big Finish Productions.

Doctor Who

 * The Hungry Earth / Cold Blood - Ambrose Northover

The Fourth Doctor Adventures

 * The Wrath of the Icini - Bragnar

Torchwood

 * The Hope - Sally