Guest Stars Nicholas Briggs voices Cybermen Jeremiah Krage as Cyberman Michelle Gomez as Missy Samuel Anderson as Danny Pink Jemma Redgrave as Kate Stewart Ingrid Oliver as Petronella Osgood Chris Addison as Seb Nick Frost as Santa Claus Antonio Bourouphael as Boy Sanjeev Bhaskar as Colonel Ahmed Shane Keogh-Grenade as Teenage Boy Katie Bignell as Teenage Girl James Pearse as Graham