Hugh Skinner

 voiced several roles in various Big Finish spin-offs.

Big Finish Special Releases

 * The Worlds of Big Finish
 * The Archive - Lucian Theta-Singh
 * Kronos Vad's History of Earth (Vol. 36,679) - Captain Edwin Turner

Bernice Summerfield

 * In Living Memory - Theon

Torchwood

 * The Vigil - Sebastian Vaughan