Nicholas Courtney reprises his role as Brigadier Sir Alistair Lethbridge-Stewart from the classic Doctor Who (1963) for the final time. The character reappears in Death in Heaven (2014), but in the form of a Cyberman.
Final Appearance of Nicholas Courtney in any Doctor who related media, Courtney is the only actor to have appeared with the first 8 doctors and alongside David Tennant (the Tenth Doctor) in numerous big finish audios.