The Day of the Doctor
Following Courtney's 22 February 2011 death, Lethbridge-Stewart was written out as having also died; when the Eleventh Doctor wanted to contact him in "The Wedding of River Song", he was informed that Sir Alistair has died some months earlier at his nursing home. The Brigadier was mentioned several times in the series's golden anniversary episode, "The Day of the Doctor", and quoted once; and, with a prominent close-up of his archival portrait, Courtney is the only individual to appear in all the "Doctor Who" anniversary stories prior to "The Day of the Doctor".