References Outside of Doctor Who
The character also appears briefly in a cameo role at the end of writer Paul Cornell's novelisation of the 1997 ITV science-fiction serial The Uninvited. Although the character is not named in the book, the description is that of Lethbridge-Stewart and Cornell later admitted that this was indeed his intention.
Marvel Comics' Excalibur featured an organisation called W.H.O. (the Weird Happenings Organisation) run by a Brigadier Alysande Stuart. She is similar to Kate Stewart who appeared in the Eleventh Doctor episode "The Power of Three". Both changed their surname so as not to be overprivileged because of their well-known father/s. Her twin brother Alistaire was WHO's "scientific advisor" (the role the Doctor had in UNIT). A character named "Brigadier Lethbridge-Stewart" had earlier appeared in three panels of Uncanny X-Men #218, supervising the arrest of the Juggernaut in Edinburgh, where he also calls out to a "Sergeant-Major Benton" at one point.
The Sherlock Holmes novel Waters of Death by Kel Richards features a naval commander called Ralph Lethbridge-Stewart, alongside Captain Harry Sullivan and Lieutenant Philip Benton. It is set in the same fictional location as the Doctor Who story Terror of the Zygons.
An unnamed army brigadier, who looks and acts very similar to Lethbridge-Stewart, appears in the comic strip Caballistics, Inc.. He first appeared in the story Going Underground, where he is in charge of the army's response following a demon invasion of the London Underground; a member of his SAS team refers to "bloody robot yetis" having been down there once. He shows up again in the story Ashes, in charge of the military response to a devastating attack on Glasgow. This character is one of several references to both the Doctor Who universe and other sci-fi/horror properties in Caballistics.
Although unnamed, two characters strongly resembling Lethbridge-Stewart and Sergeant Benton (who was specifically named) appear in the John M. Ford Star Trek novel How Much for Just the Planet? at a rather treacherous golf course on the planet Direidi.
Similarly to Alysande Stuart, the comic book Jack Staff includes Commander Liz Stewart of S.M.I.L.E. (Secret Military Intelligence Lethal Executive).
The Brigadier briefly appears in Kim Newman and Eugene Byrne's Back in the USSA, supporting Britain's involvement in an alternate Vietnam War. However, Doctor Who is referenced later in the story, meaning that in the universe of Back in the USSA, both the show and the character from it are 'real'.
The Brigadier was referenced in name in the ABC Family show The Middleman. In the episode "The Clotharian Contamination Protocol," Wendy and The Middleman go to check out a returned Voyager probe. However, a nearby NASA listening station team also arrives. Using their random IDs, and due to the quick thinking of the Middleman, they are intimidated into leaving. As they go, the Middleman calls out the other team's lead, "Mr... Lethbridge-Stewart, if that is your real name!"
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