Guest Stars Nicholas Briggs voices Cybermen Jacob Anderson as Inston-Vee Vinder Rochenda Sandall as Azure Bhavnisha Parmar as Sonya Khan Sam Spruell as Swarm Jo Martin as The Doctor Nadia Albina as Diane Steve Oram as Joseph Williamson Craige Els as Karvanista Jonny Mathers as Passenger Thaddea Graham as Bel Barbara Flynn as Tecteun Craig Parkinson as Grand Serpent Matthew Needham as Old Swarm Nigel Richard Lambert voices Priest Triangle Amanda Drew voices Mouri Chantelle Pierre as Police Officer