Ajjaz Awad

 voiced several characters for Big Finish Productions including the War Doctor's companion Case and the First Doctor's companion Katarina.

The War Doctor
As Case
 * Warbringer
 * Consequences
 * Destroyer
 * Saviour
 * Comrades-in-Arms
 * A Mother's Love
 * Berserker
 * Memnos

As Katarina

Ravenous

 * Companion Piece

The Early Adventures

 * Daughter of the Gods

Other roles

The Fifth Doctor Adventures

 * Nightmare of the Daleks - Foster

The War Doctor

 * Consequences - Auto Case
 * Destroyer - Auto Case
 * Memnos - Karina

Dalek Universe

 * The Dalek Defence / The Triumph of Davros - Vilsa / Jeska / Dranta

The First Doctor Adventures

 * The Phoenicians - Elissa of Tyre

UNIT: The New Series

 * This Sleep of Death - Private Meghan Coates

Missy

 * Too Many Masters - Lydia

Torchwood

 * The Dollhouse - Gabriella Martinez