Guest Stars John Scott Martin as Dalek Operator Roy Skelton as Dalek Voice David Banks as Cyberleader Mark Hardy as Cyber Lieutenant Paul Jerrico as The Castellan Stuart Blake as Commander Philip Latham as Lord President Borusa Ray Float as Sergeant Richard Mathews as Rassilon David Savile as Crichton Dinah Sheridan as Chancellor Flavia William Kenton as Cyber Scout John Tallents as Guard Keith Hodiak as Raston Robot Stephen Meredith as Technician