 The episode marks the first appearance of Davros since the 1988 serial Remembrance of the Daleks ; he is portrayed by Julian Bleach . It is also the first Doctor Who appearance of Eve Myles as Gwen Cooper ; Gareth David @-@ Lloyd as Ianto Jones ; Tommy Knight as Luke Smith ; and Alexander Armstrong as the voice of Mr Smith . <unk> <unk> and Penelope Wilton reprise supporting roles as Martha 's mother Francine Jones and former Prime Minister Harriet Jones respectively . Paul O 'Grady and Richard Dawkins make cameo appearances as themselves as television personalities who attempt to assuage public fear . 
