In "The Sarah Jane Adventures" story "The Wedding of Sarah Jane Smith", Clyde Langer tells Peter Dalton that the Brigadier cannot make it to the wedding because he is back in Peru. It had been intended by the production team that Lethbridge-Stewart would indeed appear in the story and meet the Tenth Doctor, but Courtney was recovering from a stroke and unable to take part. He is reported to be in Peru for a third time in "Death of the Doctor" (2010). Clyde describes him as being Sarah Jane's oldest friend; Sarah Jane met both the Doctor and Sir Alistair in the first episode of the Third Doctor serial, "The Time Warrior" (1974).