General Maxwell-Lennon was a high-ranking member of UNIT. The Fourth Doctor and Joan Brown warned him about a poison gas cloud that would smother the Earth thanks to a galactic cyclone, which they later discovered was the work of the Zircon. (COMIC: Doomcloud)
Behind the scenes
Maxwell-Lennon's sole appearance is in the Mighty Midget Doctor Who Comic reprint of Doomcloud, in which he replaced the Brigadier, whilst the Third Doctor was replaced by the Fourth Doctor and Sarah by Joan Brown. The Brigadier's moustache was removed and a pair of glasses added.