It stars Nicholas Courtney reprising his role as Brigadier Lethbridge-Stewart, the former commander of UNIT (United Nations Intelligence Taskforce).
Nicholas II of Russia | Saint Nicholas | Nicholas I of Russia | Nicholas II | Nicholas I | Nicholas Nickleby | Nicholas Ray | Nicholas Roerich | Nicholas Briggs | St. Nicholas | Courtney Pine | Courtney Love | Nicholas of Cusa | Nicholas Longworth | Nicholas Pegg | Nicholas | Nicholas Parsons | Nicholas Lyndhurst | Nicholas Lens | Nicholas Sparks | Nicholas Meyer | Nicholas McGegan | Nicholas Maw | Nicholas Kaldor | Nassim Nicholas Taleb | St. Nicholas Magazine | Pope Nicholas IV | Nicholas Tse | Nicholas I of Montenegro | Nicholas G. Carr |
During the filming of this episode, Nicholas Courtney (Max) and Roger Delgado (Tapiro) met for the first time; they are best known for their recurring roles in Doctor Who in the early 1970s, playing Brigadier Lethbridge-Stewart and the Master respectively.