Annabelle Dowler

 played Walter Simeon's mother in the Doctor Who television story The Snowmen.

She also voiced several characters for Big Finish Productions.

Doctor Who

 * The Snowmen - Walter Simeon's mother

The Sixth Doctor Adventures

 * Elevation - Burr

Stranded

 * The Long Way Round - Houlbrooke

The Diary of River Song

 * Barrister to the Stars - Integers / Contingent / Queen

The Robots

 * The Robots of Life - Jasdar Crick
 * Love Me Not - Robot Jasdar Crick