The Human Factor is a Big Finish Productions audio drama based on the long-running British science fiction television series Doctor Who. Plot The Daleks continue their attack on the galaxy. Cast Susan Mendes – Sarah Mowatt Alby Brook – Mark McDonnell Kalendorf – Gareth Thomas Pellan – John Wadmore Narrator – Joyce Gibbs Admiral Cheviat – Ian Brooker Ed Byers – Ian Brooker Roboman – Ian Brooker Tanlee – David Sax Dalek Voices – Nicholas BriggsAlistair Lock External links Big Finish Productions – The Human Factor Dalek Empire audio plays Audio plays by Nicholas Briggs