Ajjaz Awad

 voiced several characters in the various Big Finish Doctor Who audio stories and spin-offs, notably recreating the role of the First Doctor's companion Katarina.

Credits
As Katarina

Ravenous

 * Companion Piece

The Early Adventures

 * Daughter of the Gods

Other roles

Fifth Doctor Adventures

 * Nightmare of the Daleks - Foster

The First Doctor Adventures

 * The Phoenicians - Elissa of Tyre

UNIT: The New Series

 * This Sleep of Death - Meghan Coates

Missy

 * Too Many Masters - Lydia

Torchwood

 * The Dollhouse - Gabriella Martinez